diff --git a/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin.proto b/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin.proto
index 56dbff19e17b..491606e6f711 100644
--- a/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin.proto
+++ b/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin.proto
@@ -30,7 +30,6 @@ option java_outer_classname = "SpannerDatabaseAdminProto";
 option java_package = "com.google.spanner.admin.database.v1";
 option php_namespace = "Google\\Cloud\\Spanner\\Admin\\Database\\V1";
 
-
 // Cloud Spanner Database Admin API
 //
 // The Cloud Spanner Database Admin API can be used to create, drop, and
@@ -49,10 +48,11 @@ service DatabaseAdmin {
   // have a name of the format `<database_name>/operations/<operation_id>` and
   // can be used to track preparation of the database. The
   // [metadata][google.longrunning.Operation.metadata] field type is
-  // [CreateDatabaseMetadata][google.spanner.admin.database.v1.CreateDatabaseMetadata]. The
-  // [response][google.longrunning.Operation.response] field type is
+  // [CreateDatabaseMetadata][google.spanner.admin.database.v1.CreateDatabaseMetadata].
+  // The [response][google.longrunning.Operation.response] field type is
   // [Database][google.spanner.admin.database.v1.Database], if successful.
-  rpc CreateDatabase(CreateDatabaseRequest) returns (google.longrunning.Operation) {
+  rpc CreateDatabase(CreateDatabaseRequest)
+      returns (google.longrunning.Operation) {
     option (google.api.http) = {
       post: "/v1/{parent=projects/*/instances/*}/databases"
       body: "*"
@@ -72,8 +72,10 @@ service DatabaseAdmin {
   // the format `<database_name>/operations/<operation_id>` and can be used to
   // track execution of the schema change(s). The
   // [metadata][google.longrunning.Operation.metadata] field type is
-  // [UpdateDatabaseDdlMetadata][google.spanner.admin.database.v1.UpdateDatabaseDdlMetadata].  The operation has no response.
-  rpc UpdateDatabaseDdl(UpdateDatabaseDdlRequest) returns (google.longrunning.Operation) {
+  // [UpdateDatabaseDdlMetadata][google.spanner.admin.database.v1.UpdateDatabaseDdlMetadata].
+  // The operation has no response.
+  rpc UpdateDatabaseDdl(UpdateDatabaseDdlRequest)
+      returns (google.longrunning.Operation) {
     option (google.api.http) = {
       patch: "/v1/{database=projects/*/instances/*/databases/*}/ddl"
       body: "*"
@@ -101,7 +103,8 @@ service DatabaseAdmin {
   //
   // Authorization requires `spanner.databases.setIamPolicy` permission on
   // [resource][google.iam.v1.SetIamPolicyRequest.resource].
-  rpc SetIamPolicy(google.iam.v1.SetIamPolicyRequest) returns (google.iam.v1.Policy) {
+  rpc SetIamPolicy(google.iam.v1.SetIamPolicyRequest)
+      returns (google.iam.v1.Policy) {
     option (google.api.http) = {
       post: "/v1/{resource=projects/*/instances/*/databases/*}:setIamPolicy"
       body: "*"
@@ -113,7 +116,8 @@ service DatabaseAdmin {
   //
   // Authorization requires `spanner.databases.getIamPolicy` permission on
   // [resource][google.iam.v1.GetIamPolicyRequest.resource].
-  rpc GetIamPolicy(google.iam.v1.GetIamPolicyRequest) returns (google.iam.v1.Policy) {
+  rpc GetIamPolicy(google.iam.v1.GetIamPolicyRequest)
+      returns (google.iam.v1.Policy) {
     option (google.api.http) = {
       post: "/v1/{resource=projects/*/instances/*/databases/*}:getIamPolicy"
       body: "*"
@@ -126,7 +130,8 @@ service DatabaseAdmin {
   // a NOT_FOUND error if the user has `spanner.databases.list` permission on
   // the containing Cloud Spanner instance. Otherwise returns an empty set of
   // permissions.
-  rpc TestIamPermissions(google.iam.v1.TestIamPermissionsRequest) returns (google.iam.v1.TestIamPermissionsResponse) {
+  rpc TestIamPermissions(google.iam.v1.TestIamPermissionsRequest)
+      returns (google.iam.v1.TestIamPermissionsResponse) {
     option (google.api.http) = {
       post: "/v1/{resource=projects/*/instances/*/databases/*}:testIamPermissions"
       body: "*"
@@ -160,7 +165,8 @@ message Database {
   State state = 2;
 }
 
-// The request for [ListDatabases][google.spanner.admin.database.v1.DatabaseAdmin.ListDatabases].
+// The request for
+// [ListDatabases][google.spanner.admin.database.v1.DatabaseAdmin.ListDatabases].
 message ListDatabasesRequest {
   // Required. The instance whose databases should be listed.
   // Values are of the form `projects/<project>/instances/<instance>`.
@@ -171,23 +177,26 @@ message ListDatabasesRequest {
   int32 page_size = 3;
 
   // If non-empty, `page_token` should contain a
-  // [next_page_token][google.spanner.admin.database.v1.ListDatabasesResponse.next_page_token] from a
-  // previous [ListDatabasesResponse][google.spanner.admin.database.v1.ListDatabasesResponse].
+  // [next_page_token][google.spanner.admin.database.v1.ListDatabasesResponse.next_page_token]
+  // from a previous
+  // [ListDatabasesResponse][google.spanner.admin.database.v1.ListDatabasesResponse].
   string page_token = 4;
 }
 
-// The response for [ListDatabases][google.spanner.admin.database.v1.DatabaseAdmin.ListDatabases].
+// The response for
+// [ListDatabases][google.spanner.admin.database.v1.DatabaseAdmin.ListDatabases].
 message ListDatabasesResponse {
   // Databases that matched the request.
   repeated Database databases = 1;
 
   // `next_page_token` can be sent in a subsequent
-  // [ListDatabases][google.spanner.admin.database.v1.DatabaseAdmin.ListDatabases] call to fetch more
-  // of the matching databases.
+  // [ListDatabases][google.spanner.admin.database.v1.DatabaseAdmin.ListDatabases]
+  // call to fetch more of the matching databases.
   string next_page_token = 2;
 }
 
-// The request for [CreateDatabase][google.spanner.admin.database.v1.DatabaseAdmin.CreateDatabase].
+// The request for
+// [CreateDatabase][google.spanner.admin.database.v1.DatabaseAdmin.CreateDatabase].
 message CreateDatabaseRequest {
   // Required. The name of the instance that will serve the new database.
   // Values are of the form `projects/<project>/instances/<instance>`.
@@ -214,7 +223,8 @@ message CreateDatabaseMetadata {
   string database = 1;
 }
 
-// The request for [GetDatabase][google.spanner.admin.database.v1.DatabaseAdmin.GetDatabase].
+// The request for
+// [GetDatabase][google.spanner.admin.database.v1.DatabaseAdmin.GetDatabase].
 message GetDatabaseRequest {
   // Required. The name of the requested database. Values are of the form
   // `projects/<project>/instances/<instance>/databases/<database>`.
@@ -235,8 +245,8 @@ message GetDatabaseRequest {
 // Each batch of statements is assigned a name which can be used with
 // the [Operations][google.longrunning.Operations] API to monitor
 // progress. See the
-// [operation_id][google.spanner.admin.database.v1.UpdateDatabaseDdlRequest.operation_id] field for more
-// details.
+// [operation_id][google.spanner.admin.database.v1.UpdateDatabaseDdlRequest.operation_id]
+// field for more details.
 message UpdateDatabaseDdlRequest {
   // Required. The database to update.
   string database = 1;
@@ -251,18 +261,20 @@ message UpdateDatabaseDdlRequest {
   //
   // Specifying an explicit operation ID simplifies determining
   // whether the statements were executed in the event that the
-  // [UpdateDatabaseDdl][google.spanner.admin.database.v1.DatabaseAdmin.UpdateDatabaseDdl] call is replayed,
-  // or the return value is otherwise lost: the [database][google.spanner.admin.database.v1.UpdateDatabaseDdlRequest.database] and
-  // `operation_id` fields can be combined to form the
+  // [UpdateDatabaseDdl][google.spanner.admin.database.v1.DatabaseAdmin.UpdateDatabaseDdl]
+  // call is replayed, or the return value is otherwise lost: the
+  // [database][google.spanner.admin.database.v1.UpdateDatabaseDdlRequest.database]
+  // and `operation_id` fields can be combined to form the
   // [name][google.longrunning.Operation.name] of the resulting
-  // [longrunning.Operation][google.longrunning.Operation]: `<database>/operations/<operation_id>`.
+  // [longrunning.Operation][google.longrunning.Operation]:
+  // `<database>/operations/<operation_id>`.
   //
   // `operation_id` should be unique within the database, and must be
   // a valid identifier: `[a-z][a-z0-9_]*`. Note that
   // automatically-generated operation IDs always begin with an
   // underscore. If the named operation already exists,
-  // [UpdateDatabaseDdl][google.spanner.admin.database.v1.DatabaseAdmin.UpdateDatabaseDdl] returns
-  // `ALREADY_EXISTS`.
+  // [UpdateDatabaseDdl][google.spanner.admin.database.v1.DatabaseAdmin.UpdateDatabaseDdl]
+  // returns `ALREADY_EXISTS`.
   string operation_id = 3;
 }
 
@@ -282,19 +294,22 @@ message UpdateDatabaseDdlMetadata {
   repeated google.protobuf.Timestamp commit_timestamps = 3;
 }
 
-// The request for [DropDatabase][google.spanner.admin.database.v1.DatabaseAdmin.DropDatabase].
+// The request for
+// [DropDatabase][google.spanner.admin.database.v1.DatabaseAdmin.DropDatabase].
 message DropDatabaseRequest {
   // Required. The database to be dropped.
   string database = 1;
 }
 
-// The request for [GetDatabaseDdl][google.spanner.admin.database.v1.DatabaseAdmin.GetDatabaseDdl].
+// The request for
+// [GetDatabaseDdl][google.spanner.admin.database.v1.DatabaseAdmin.GetDatabaseDdl].
 message GetDatabaseDdlRequest {
   // Required. The database whose schema we wish to get.
   string database = 1;
 }
 
-// The response for [GetDatabaseDdl][google.spanner.admin.database.v1.DatabaseAdmin.GetDatabaseDdl].
+// The response for
+// [GetDatabaseDdl][google.spanner.admin.database.v1.DatabaseAdmin.GetDatabaseDdl].
 message GetDatabaseDdlResponse {
   // A list of formatted DDL statements defining the schema of the database
   // specified in the request.
diff --git a/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin_pb2_grpc.py b/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin_pb2_grpc.py
index 523a04f0a85a..64b083bfd93c 100644
--- a/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin_pb2_grpc.py
+++ b/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin_pb2_grpc.py
@@ -94,8 +94,8 @@ def CreateDatabase(self, request, context):
     have a name of the format `<database_name>/operations/<operation_id>` and
     can be used to track preparation of the database. The
     [metadata][google.longrunning.Operation.metadata] field type is
-    [CreateDatabaseMetadata][google.spanner.admin.database.v1.CreateDatabaseMetadata]. The
-    [response][google.longrunning.Operation.response] field type is
+    [CreateDatabaseMetadata][google.spanner.admin.database.v1.CreateDatabaseMetadata].
+    The [response][google.longrunning.Operation.response] field type is
     [Database][google.spanner.admin.database.v1.Database], if successful.
     """
         context.set_code(grpc.StatusCode.UNIMPLEMENTED)
@@ -116,7 +116,8 @@ def UpdateDatabaseDdl(self, request, context):
     the format `<database_name>/operations/<operation_id>` and can be used to
     track execution of the schema change(s). The
     [metadata][google.longrunning.Operation.metadata] field type is
-    [UpdateDatabaseDdlMetadata][google.spanner.admin.database.v1.UpdateDatabaseDdlMetadata].  The operation has no response.
+    [UpdateDatabaseDdlMetadata][google.spanner.admin.database.v1.UpdateDatabaseDdlMetadata].
+    The operation has no response.
     """
         context.set_code(grpc.StatusCode.UNIMPLEMENTED)
         context.set_details("Method not implemented!")
diff --git a/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin.proto b/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin.proto
index e960e5428e3a..c6ca85c9ce89 100644
--- a/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin.proto
+++ b/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin.proto
@@ -31,7 +31,6 @@ option java_outer_classname = "SpannerInstanceAdminProto";
 option java_package = "com.google.spanner.admin.instance.v1";
 option php_namespace = "Google\\Cloud\\Spanner\\Admin\\Instance\\V1";
 
-
 // Cloud Spanner Instance Admin API
 //
 // The Cloud Spanner Instance Admin API can be used to create, delete,
@@ -55,7 +54,8 @@ option php_namespace = "Google\\Cloud\\Spanner\\Admin\\Instance\\V1";
 // databases in that instance, and their performance may suffer.
 service InstanceAdmin {
   // Lists the supported instance configurations for a given project.
-  rpc ListInstanceConfigs(ListInstanceConfigsRequest) returns (ListInstanceConfigsResponse) {
+  rpc ListInstanceConfigs(ListInstanceConfigsRequest)
+      returns (ListInstanceConfigsResponse) {
     option (google.api.http) = {
       get: "/v1/{parent=projects/*}/instanceConfigs"
     };
@@ -116,7 +116,8 @@ service InstanceAdmin {
   // [CreateInstanceMetadata][google.spanner.admin.instance.v1.CreateInstanceMetadata].
   // The [response][google.longrunning.Operation.response] field type is
   // [Instance][google.spanner.admin.instance.v1.Instance], if successful.
-  rpc CreateInstance(CreateInstanceRequest) returns (google.longrunning.Operation) {
+  rpc CreateInstance(CreateInstanceRequest)
+      returns (google.longrunning.Operation) {
     option (google.api.http) = {
       post: "/v1/{parent=projects/*}/instances"
       body: "*"
@@ -137,9 +138,9 @@ service InstanceAdmin {
   // Until completion of the returned operation:
   //
   //   * Cancelling the operation sets its metadata's
-  //     [cancel_time][google.spanner.admin.instance.v1.UpdateInstanceMetadata.cancel_time], and begins
-  //     restoring resources to their pre-request values. The operation
-  //     is guaranteed to succeed at undoing all resource changes,
+  //     [cancel_time][google.spanner.admin.instance.v1.UpdateInstanceMetadata.cancel_time],
+  //     and begins restoring resources to their pre-request values. The
+  //     operation is guaranteed to succeed at undoing all resource changes,
   //     after which point it terminates with a `CANCELLED` status.
   //   * All other attempts to modify the instance are rejected.
   //   * Reading the instance via the API continues to give the pre-request
@@ -163,7 +164,8 @@ service InstanceAdmin {
   //
   // Authorization requires `spanner.instances.update` permission on
   // resource [name][google.spanner.admin.instance.v1.Instance.name].
-  rpc UpdateInstance(UpdateInstanceRequest) returns (google.longrunning.Operation) {
+  rpc UpdateInstance(UpdateInstanceRequest)
+      returns (google.longrunning.Operation) {
     option (google.api.http) = {
       patch: "/v1/{instance.name=projects/*/instances/*}"
       body: "*"
@@ -192,7 +194,8 @@ service InstanceAdmin {
   //
   // Authorization requires `spanner.instances.setIamPolicy` on
   // [resource][google.iam.v1.SetIamPolicyRequest.resource].
-  rpc SetIamPolicy(google.iam.v1.SetIamPolicyRequest) returns (google.iam.v1.Policy) {
+  rpc SetIamPolicy(google.iam.v1.SetIamPolicyRequest)
+      returns (google.iam.v1.Policy) {
     option (google.api.http) = {
       post: "/v1/{resource=projects/*/instances/*}:setIamPolicy"
       body: "*"
@@ -204,7 +207,8 @@ service InstanceAdmin {
   //
   // Authorization requires `spanner.instances.getIamPolicy` on
   // [resource][google.iam.v1.GetIamPolicyRequest.resource].
-  rpc GetIamPolicy(google.iam.v1.GetIamPolicyRequest) returns (google.iam.v1.Policy) {
+  rpc GetIamPolicy(google.iam.v1.GetIamPolicyRequest)
+      returns (google.iam.v1.Policy) {
     option (google.api.http) = {
       post: "/v1/{resource=projects/*/instances/*}:getIamPolicy"
       body: "*"
@@ -217,7 +221,8 @@ service InstanceAdmin {
   // result in a NOT_FOUND error if the user has `spanner.instances.list`
   // permission on the containing Google Cloud Project. Otherwise returns an
   // empty set of permissions.
-  rpc TestIamPermissions(google.iam.v1.TestIamPermissionsRequest) returns (google.iam.v1.TestIamPermissionsResponse) {
+  rpc TestIamPermissions(google.iam.v1.TestIamPermissionsRequest)
+      returns (google.iam.v1.TestIamPermissionsResponse) {
     option (google.api.http) = {
       post: "/v1/{resource=projects/*/instances/*}:testIamPermissions"
       body: "*"
@@ -273,15 +278,16 @@ message Instance {
   // Required. The number of nodes allocated to this instance. This may be zero
   // in API responses for instances that are not yet in state `READY`.
   //
-  // See [the documentation](https://cloud.google.com/spanner/docs/instances#node_count)
+  // See [the
+  // documentation](https://cloud.google.com/spanner/docs/instances#node_count)
   // for more information about nodes.
   int32 node_count = 5;
 
   // Output only. The current instance state. For
-  // [CreateInstance][google.spanner.admin.instance.v1.InstanceAdmin.CreateInstance], the state must be
-  // either omitted or set to `CREATING`. For
-  // [UpdateInstance][google.spanner.admin.instance.v1.InstanceAdmin.UpdateInstance], the state must be
-  // either omitted or set to `READY`.
+  // [CreateInstance][google.spanner.admin.instance.v1.InstanceAdmin.CreateInstance],
+  // the state must be either omitted or set to `CREATING`. For
+  // [UpdateInstance][google.spanner.admin.instance.v1.InstanceAdmin.UpdateInstance],
+  // the state must be either omitted or set to `READY`.
   State state = 6;
 
   // Cloud Labels are a flexible and lightweight mechanism for organizing cloud
@@ -308,7 +314,8 @@ message Instance {
   map<string, string> labels = 7;
 }
 
-// The request for [ListInstanceConfigs][google.spanner.admin.instance.v1.InstanceAdmin.ListInstanceConfigs].
+// The request for
+// [ListInstanceConfigs][google.spanner.admin.instance.v1.InstanceAdmin.ListInstanceConfigs].
 message ListInstanceConfigsRequest {
   // Required. The name of the project for which a list of supported instance
   // configurations is requested. Values are of the form
@@ -321,18 +328,20 @@ message ListInstanceConfigsRequest {
 
   // If non-empty, `page_token` should contain a
   // [next_page_token][google.spanner.admin.instance.v1.ListInstanceConfigsResponse.next_page_token]
-  // from a previous [ListInstanceConfigsResponse][google.spanner.admin.instance.v1.ListInstanceConfigsResponse].
+  // from a previous
+  // [ListInstanceConfigsResponse][google.spanner.admin.instance.v1.ListInstanceConfigsResponse].
   string page_token = 3;
 }
 
-// The response for [ListInstanceConfigs][google.spanner.admin.instance.v1.InstanceAdmin.ListInstanceConfigs].
+// The response for
+// [ListInstanceConfigs][google.spanner.admin.instance.v1.InstanceAdmin.ListInstanceConfigs].
 message ListInstanceConfigsResponse {
   // The list of requested instance configurations.
   repeated InstanceConfig instance_configs = 1;
 
   // `next_page_token` can be sent in a subsequent
-  // [ListInstanceConfigs][google.spanner.admin.instance.v1.InstanceAdmin.ListInstanceConfigs] call to
-  // fetch more of the matching instance configurations.
+  // [ListInstanceConfigs][google.spanner.admin.instance.v1.InstanceAdmin.ListInstanceConfigs]
+  // call to fetch more of the matching instance configurations.
   string next_page_token = 2;
 }
 
@@ -344,14 +353,16 @@ message GetInstanceConfigRequest {
   string name = 1;
 }
 
-// The request for [GetInstance][google.spanner.admin.instance.v1.InstanceAdmin.GetInstance].
+// The request for
+// [GetInstance][google.spanner.admin.instance.v1.InstanceAdmin.GetInstance].
 message GetInstanceRequest {
   // Required. The name of the requested instance. Values are of the form
   // `projects/<project>/instances/<instance>`.
   string name = 1;
 }
 
-// The request for [CreateInstance][google.spanner.admin.instance.v1.InstanceAdmin.CreateInstance].
+// The request for
+// [CreateInstance][google.spanner.admin.instance.v1.InstanceAdmin.CreateInstance].
 message CreateInstanceRequest {
   // Required. The name of the project in which to create the instance. Values
   // are of the form `projects/<project>`.
@@ -367,7 +378,8 @@ message CreateInstanceRequest {
   Instance instance = 3;
 }
 
-// The request for [ListInstances][google.spanner.admin.instance.v1.InstanceAdmin.ListInstances].
+// The request for
+// [ListInstances][google.spanner.admin.instance.v1.InstanceAdmin.ListInstances].
 message ListInstancesRequest {
   // Required. The name of the project for which a list of instances is
   // requested. Values are of the form `projects/<project>`.
@@ -378,8 +390,9 @@ message ListInstancesRequest {
   int32 page_size = 2;
 
   // If non-empty, `page_token` should contain a
-  // [next_page_token][google.spanner.admin.instance.v1.ListInstancesResponse.next_page_token] from a
-  // previous [ListInstancesResponse][google.spanner.admin.instance.v1.ListInstancesResponse].
+  // [next_page_token][google.spanner.admin.instance.v1.ListInstancesResponse.next_page_token]
+  // from a previous
+  // [ListInstancesResponse][google.spanner.admin.instance.v1.ListInstancesResponse].
   string page_token = 3;
 
   // An expression for filtering the results of the request. Filter rules are
@@ -404,31 +417,38 @@ message ListInstancesRequest {
   string filter = 4;
 }
 
-// The response for [ListInstances][google.spanner.admin.instance.v1.InstanceAdmin.ListInstances].
+// The response for
+// [ListInstances][google.spanner.admin.instance.v1.InstanceAdmin.ListInstances].
 message ListInstancesResponse {
   // The list of requested instances.
   repeated Instance instances = 1;
 
   // `next_page_token` can be sent in a subsequent
-  // [ListInstances][google.spanner.admin.instance.v1.InstanceAdmin.ListInstances] call to fetch more
-  // of the matching instances.
+  // [ListInstances][google.spanner.admin.instance.v1.InstanceAdmin.ListInstances]
+  // call to fetch more of the matching instances.
   string next_page_token = 2;
 }
 
-// The request for [UpdateInstance][google.spanner.admin.instance.v1.InstanceAdmin.UpdateInstance].
+// The request for
+// [UpdateInstance][google.spanner.admin.instance.v1.InstanceAdmin.UpdateInstance].
 message UpdateInstanceRequest {
   // Required. The instance to update, which must always include the instance
-  // name.  Otherwise, only fields mentioned in [][google.spanner.admin.instance.v1.UpdateInstanceRequest.field_mask] need be included.
+  // name.  Otherwise, only fields mentioned in
+  // [][google.spanner.admin.instance.v1.UpdateInstanceRequest.field_mask] need
+  // be included.
   Instance instance = 1;
 
-  // Required. A mask specifying which fields in [][google.spanner.admin.instance.v1.UpdateInstanceRequest.instance] should be updated.
-  // The field mask must always be specified; this prevents any future fields in
-  // [][google.spanner.admin.instance.v1.Instance] from being erased accidentally by clients that do not know
-  // about them.
+  // Required. A mask specifying which fields in
+  // [][google.spanner.admin.instance.v1.UpdateInstanceRequest.instance] should
+  // be updated. The field mask must always be specified; this prevents any
+  // future fields in
+  // [][google.spanner.admin.instance.v1.Instance] from being erased
+  // accidentally by clients that do not know about them.
   google.protobuf.FieldMask field_mask = 2;
 }
 
-// The request for [DeleteInstance][google.spanner.admin.instance.v1.InstanceAdmin.DeleteInstance].
+// The request for
+// [DeleteInstance][google.spanner.admin.instance.v1.InstanceAdmin.DeleteInstance].
 message DeleteInstanceRequest {
   // Required. The name of the instance to be deleted. Values are of the form
   // `projects/<project>/instances/<instance>`
@@ -442,8 +462,8 @@ message CreateInstanceMetadata {
   Instance instance = 1;
 
   // The time at which the
-  // [CreateInstance][google.spanner.admin.instance.v1.InstanceAdmin.CreateInstance] request was
-  // received.
+  // [CreateInstance][google.spanner.admin.instance.v1.InstanceAdmin.CreateInstance]
+  // request was received.
   google.protobuf.Timestamp start_time = 2;
 
   // The time at which this operation was cancelled. If set, this operation is
@@ -461,7 +481,8 @@ message UpdateInstanceMetadata {
   // The desired end state of the update.
   Instance instance = 1;
 
-  // The time at which [UpdateInstance][google.spanner.admin.instance.v1.InstanceAdmin.UpdateInstance]
+  // The time at which
+  // [UpdateInstance][google.spanner.admin.instance.v1.InstanceAdmin.UpdateInstance]
   // request was received.
   google.protobuf.Timestamp start_time = 2;
 
diff --git a/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin_pb2_grpc.py b/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin_pb2_grpc.py
index b7276a9f9252..922bba7e0df7 100644
--- a/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin_pb2_grpc.py
+++ b/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin_pb2_grpc.py
@@ -201,9 +201,9 @@ def UpdateInstance(self, request, context):
     Until completion of the returned operation:
 
     * Cancelling the operation sets its metadata's
-    [cancel_time][google.spanner.admin.instance.v1.UpdateInstanceMetadata.cancel_time], and begins
-    restoring resources to their pre-request values. The operation
-    is guaranteed to succeed at undoing all resource changes,
+    [cancel_time][google.spanner.admin.instance.v1.UpdateInstanceMetadata.cancel_time],
+    and begins restoring resources to their pre-request values. The
+    operation is guaranteed to succeed at undoing all resource changes,
     after which point it terminates with a `CANCELLED` status.
     * All other attempts to modify the instance are rejected.
     * Reading the instance via the API continues to give the pre-request
diff --git a/spanner/google/cloud/spanner_v1/proto/keys.proto b/spanner/google/cloud/spanner_v1/proto/keys.proto
index 2078610f310f..1ae95749362f 100644
--- a/spanner/google/cloud/spanner_v1/proto/keys.proto
+++ b/spanner/google/cloud/spanner_v1/proto/keys.proto
@@ -26,7 +26,6 @@ option java_outer_classname = "KeysProto";
 option java_package = "com.google.spanner.v1";
 option php_namespace = "Google\\Cloud\\Spanner\\V1";
 
-
 // KeyRange represents a range of rows in a table or index.
 //
 // A range has a start key and an end key. These keys can be open or
@@ -34,7 +33,8 @@ option php_namespace = "Google\\Cloud\\Spanner\\V1";
 //
 // Keys are represented by lists, where the ith value in the list
 // corresponds to the ith component of the table or index primary key.
-// Individual values are encoded as described [here][google.spanner.v1.TypeCode].
+// Individual values are encoded as described
+// [here][google.spanner.v1.TypeCode].
 //
 // For example, consider the following table definition:
 //
@@ -152,8 +152,8 @@ message KeySet {
   // encoded as described [here][google.spanner.v1.TypeCode].
   repeated google.protobuf.ListValue keys = 1;
 
-  // A list of key ranges. See [KeyRange][google.spanner.v1.KeyRange] for more information about
-  // key range specifications.
+  // A list of key ranges. See [KeyRange][google.spanner.v1.KeyRange] for more
+  // information about key range specifications.
   repeated KeyRange ranges = 2;
 
   // For convenience `all` can be set to `true` to indicate that this
diff --git a/spanner/google/cloud/spanner_v1/proto/mutation.proto b/spanner/google/cloud/spanner_v1/proto/mutation.proto
index d4d5354c9965..901e6cfe001a 100644
--- a/spanner/google/cloud/spanner_v1/proto/mutation.proto
+++ b/spanner/google/cloud/spanner_v1/proto/mutation.proto
@@ -27,18 +27,20 @@ option java_outer_classname = "MutationProto";
 option java_package = "com.google.spanner.v1";
 option php_namespace = "Google\\Cloud\\Spanner\\V1";
 
-
 // A modification to one or more Cloud Spanner rows.  Mutations can be
 // applied to a Cloud Spanner database by sending them in a
 // [Commit][google.spanner.v1.Spanner.Commit] call.
 message Mutation {
-  // Arguments to [insert][google.spanner.v1.Mutation.insert], [update][google.spanner.v1.Mutation.update], [insert_or_update][google.spanner.v1.Mutation.insert_or_update], and
+  // Arguments to [insert][google.spanner.v1.Mutation.insert],
+  // [update][google.spanner.v1.Mutation.update],
+  // [insert_or_update][google.spanner.v1.Mutation.insert_or_update], and
   // [replace][google.spanner.v1.Mutation.replace] operations.
   message Write {
     // Required. The table whose rows will be written.
     string table = 1;
 
-    // The names of the columns in [table][google.spanner.v1.Mutation.Write.table] to be written.
+    // The names of the columns in
+    // [table][google.spanner.v1.Mutation.Write.table] to be written.
     //
     // The list of columns must contain enough columns to allow
     // Cloud Spanner to derive values for all primary key columns in the
@@ -48,11 +50,13 @@ message Mutation {
     // The values to be written. `values` can contain more than one
     // list of values. If it does, then multiple rows are written, one
     // for each entry in `values`. Each list in `values` must have
-    // exactly as many entries as there are entries in [columns][google.spanner.v1.Mutation.Write.columns]
-    // above. Sending multiple lists is equivalent to sending multiple
-    // `Mutation`s, each containing one `values` entry and repeating
-    // [table][google.spanner.v1.Mutation.Write.table] and [columns][google.spanner.v1.Mutation.Write.columns]. Individual values in each list are
-    // encoded as described [here][google.spanner.v1.TypeCode].
+    // exactly as many entries as there are entries in
+    // [columns][google.spanner.v1.Mutation.Write.columns] above. Sending
+    // multiple lists is equivalent to sending multiple `Mutation`s, each
+    // containing one `values` entry and repeating
+    // [table][google.spanner.v1.Mutation.Write.table] and
+    // [columns][google.spanner.v1.Mutation.Write.columns]. Individual values in
+    // each list are encoded as described [here][google.spanner.v1.TypeCode].
     repeated google.protobuf.ListValue values = 3;
   }
 
@@ -61,9 +65,10 @@ message Mutation {
     // Required. The table whose rows will be deleted.
     string table = 1;
 
-    // Required. The primary keys of the rows within [table][google.spanner.v1.Mutation.Delete.table] to delete.
-    // Delete is idempotent. The transaction will succeed even if some or all
-    // rows do not exist.
+    // Required. The primary keys of the rows within
+    // [table][google.spanner.v1.Mutation.Delete.table] to delete. Delete is
+    // idempotent. The transaction will succeed even if some or all rows do not
+    // exist.
     KeySet key_set = 2;
   }
 
@@ -77,15 +82,16 @@ message Mutation {
     // already exist, the transaction fails with error `NOT_FOUND`.
     Write update = 2;
 
-    // Like [insert][google.spanner.v1.Mutation.insert], except that if the row already exists, then
-    // its column values are overwritten with the ones provided. Any
-    // column values not explicitly written are preserved.
+    // Like [insert][google.spanner.v1.Mutation.insert], except that if the row
+    // already exists, then its column values are overwritten with the ones
+    // provided. Any column values not explicitly written are preserved.
     Write insert_or_update = 3;
 
-    // Like [insert][google.spanner.v1.Mutation.insert], except that if the row already exists, it is
-    // deleted, and the column values provided are inserted
-    // instead. Unlike [insert_or_update][google.spanner.v1.Mutation.insert_or_update], this means any values not
-    // explicitly written become `NULL`.
+    // Like [insert][google.spanner.v1.Mutation.insert], except that if the row
+    // already exists, it is deleted, and the column values provided are
+    // inserted instead. Unlike
+    // [insert_or_update][google.spanner.v1.Mutation.insert_or_update], this
+    // means any values not explicitly written become `NULL`.
     Write replace = 4;
 
     // Delete rows from a table. Succeeds whether or not the named
diff --git a/spanner/google/cloud/spanner_v1/proto/query_plan.proto b/spanner/google/cloud/spanner_v1/proto/query_plan.proto
index 7e82a404fc42..3f3fe6733db4 100644
--- a/spanner/google/cloud/spanner_v1/proto/query_plan.proto
+++ b/spanner/google/cloud/spanner_v1/proto/query_plan.proto
@@ -26,8 +26,8 @@ option java_outer_classname = "QueryPlanProto";
 option java_package = "com.google.spanner.v1";
 option php_namespace = "Google\\Cloud\\Spanner\\V1";
 
-
-// Node information for nodes appearing in a [QueryPlan.plan_nodes][google.spanner.v1.QueryPlan.plan_nodes].
+// Node information for nodes appearing in a
+// [QueryPlan.plan_nodes][google.spanner.v1.QueryPlan.plan_nodes].
 message PlanNode {
   // Metadata associated with a parent-child relationship appearing in a
   // [PlanNode][google.spanner.v1.PlanNode].
@@ -41,14 +41,14 @@ message PlanNode {
     // with the output variable.
     string type = 2;
 
-    // Only present if the child node is [SCALAR][google.spanner.v1.PlanNode.Kind.SCALAR] and corresponds
-    // to an output variable of the parent node. The field carries the name of
-    // the output variable.
-    // For example, a `TableScan` operator that reads rows from a table will
-    // have child links to the `SCALAR` nodes representing the output variables
-    // created for each column that is read by the operator. The corresponding
-    // `variable` fields will be set to the variable names assigned to the
-    // columns.
+    // Only present if the child node is
+    // [SCALAR][google.spanner.v1.PlanNode.Kind.SCALAR] and corresponds to an
+    // output variable of the parent node. The field carries the name of the
+    // output variable. For example, a `TableScan` operator that reads rows from
+    // a table will have child links to the `SCALAR` nodes representing the
+    // output variables created for each column that is read by the operator.
+    // The corresponding `variable` fields will be set to the variable names
+    // assigned to the columns.
     string variable = 3;
   }
 
@@ -66,8 +66,8 @@ message PlanNode {
     map<string, int32> subqueries = 2;
   }
 
-  // The kind of [PlanNode][google.spanner.v1.PlanNode]. Distinguishes between the two different kinds of
-  // nodes that can appear in a query plan.
+  // The kind of [PlanNode][google.spanner.v1.PlanNode]. Distinguishes between
+  // the two different kinds of nodes that can appear in a query plan.
   enum Kind {
     // Not specified.
     KIND_UNSPECIFIED = 0;
@@ -84,14 +84,15 @@ message PlanNode {
     SCALAR = 2;
   }
 
-  // The `PlanNode`'s index in [node list][google.spanner.v1.QueryPlan.plan_nodes].
+  // The `PlanNode`'s index in [node
+  // list][google.spanner.v1.QueryPlan.plan_nodes].
   int32 index = 1;
 
   // Used to determine the type of node. May be needed for visualizing
   // different kinds of nodes differently. For example, If the node is a
-  // [SCALAR][google.spanner.v1.PlanNode.Kind.SCALAR] node, it will have a condensed representation
-  // which can be used to directly embed a description of the node in its
-  // parent.
+  // [SCALAR][google.spanner.v1.PlanNode.Kind.SCALAR] node, it will have a
+  // condensed representation which can be used to directly embed a description
+  // of the node in its parent.
   Kind kind = 2;
 
   // The display name for the node.
@@ -100,7 +101,8 @@ message PlanNode {
   // List of child node `index`es and their relationship to this parent.
   repeated ChildLink child_links = 4;
 
-  // Condensed representation for [SCALAR][google.spanner.v1.PlanNode.Kind.SCALAR] nodes.
+  // Condensed representation for
+  // [SCALAR][google.spanner.v1.PlanNode.Kind.SCALAR] nodes.
   ShortRepresentation short_representation = 5;
 
   // Attributes relevant to the node contained in a group of key-value pairs.
@@ -123,7 +125,7 @@ message PlanNode {
 // Contains an ordered list of nodes appearing in the query plan.
 message QueryPlan {
   // The nodes in the query plan. Plan nodes are returned in pre-order starting
-  // with the plan root. Each [PlanNode][google.spanner.v1.PlanNode]'s `id` corresponds to its index in
-  // `plan_nodes`.
+  // with the plan root. Each [PlanNode][google.spanner.v1.PlanNode]'s `id`
+  // corresponds to its index in `plan_nodes`.
   repeated PlanNode plan_nodes = 1;
 }
diff --git a/spanner/google/cloud/spanner_v1/proto/result_set.proto b/spanner/google/cloud/spanner_v1/proto/result_set.proto
index 152b1368a2ec..55f612f1b9bc 100644
--- a/spanner/google/cloud/spanner_v1/proto/result_set.proto
+++ b/spanner/google/cloud/spanner_v1/proto/result_set.proto
@@ -30,7 +30,6 @@ option java_outer_classname = "ResultSetProto";
 option java_package = "com.google.spanner.v1";
 option php_namespace = "Google\\Cloud\\Spanner\\V1";
 
-
 // Results from [Read][google.spanner.v1.Spanner.Read] or
 // [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql].
 message ResultSet {
@@ -38,11 +37,10 @@ message ResultSet {
   ResultSetMetadata metadata = 1;
 
   // Each element in `rows` is a row whose format is defined by
-  // [metadata.row_type][google.spanner.v1.ResultSetMetadata.row_type]. The ith element
-  // in each row matches the ith field in
-  // [metadata.row_type][google.spanner.v1.ResultSetMetadata.row_type]. Elements are
-  // encoded based on type as described
-  // [here][google.spanner.v1.TypeCode].
+  // [metadata.row_type][google.spanner.v1.ResultSetMetadata.row_type]. The ith
+  // element in each row matches the ith field in
+  // [metadata.row_type][google.spanner.v1.ResultSetMetadata.row_type]. Elements
+  // are encoded based on type as described [here][google.spanner.v1.TypeCode].
   repeated google.protobuf.ListValue rows = 2;
 
   // Query plan and execution statistics for the SQL statement that
@@ -50,7 +48,8 @@ message ResultSet {
   // [ExecuteSqlRequest.query_mode][google.spanner.v1.ExecuteSqlRequest.query_mode].
   // DML statements always produce stats containing the number of rows
   // modified, unless executed using the
-  // [ExecuteSqlRequest.QueryMode.PLAN][google.spanner.v1.ExecuteSqlRequest.QueryMode.PLAN] [ExecuteSqlRequest.query_mode][google.spanner.v1.ExecuteSqlRequest.query_mode].
+  // [ExecuteSqlRequest.QueryMode.PLAN][google.spanner.v1.ExecuteSqlRequest.QueryMode.PLAN]
+  // [ExecuteSqlRequest.query_mode][google.spanner.v1.ExecuteSqlRequest.query_mode].
   // Other fields may or may not be populated, based on the
   // [ExecuteSqlRequest.query_mode][google.spanner.v1.ExecuteSqlRequest.query_mode].
   ResultSetStats stats = 3;
@@ -75,9 +74,10 @@ message PartialResultSet {
   //
   // It is possible that the last value in values is "chunked",
   // meaning that the rest of the value is sent in subsequent
-  // `PartialResultSet`(s). This is denoted by the [chunked_value][google.spanner.v1.PartialResultSet.chunked_value]
-  // field. Two or more chunked values can be merged to form a
-  // complete value as follows:
+  // `PartialResultSet`(s). This is denoted by the
+  // [chunked_value][google.spanner.v1.PartialResultSet.chunked_value] field.
+  // Two or more chunked values can be merged to form a complete value as
+  // follows:
   //
   //   * `bool/number/null`: cannot be chunked
   //   * `string`: concatenate the strings
@@ -139,9 +139,10 @@ message PartialResultSet {
   // field value `"World" = "W" + "orl" + "d"`.
   repeated google.protobuf.Value values = 2;
 
-  // If true, then the final value in [values][google.spanner.v1.PartialResultSet.values] is chunked, and must
-  // be combined with more values from subsequent `PartialResultSet`s
-  // to obtain a complete field value.
+  // If true, then the final value in
+  // [values][google.spanner.v1.PartialResultSet.values] is chunked, and must be
+  // combined with more values from subsequent `PartialResultSet`s to obtain a
+  // complete field value.
   bool chunked_value = 3;
 
   // Streaming calls might be interrupted for a variety of reasons, such
@@ -153,14 +154,14 @@ message PartialResultSet {
 
   // Query plan and execution statistics for the statement that produced this
   // streaming result set. These can be requested by setting
-  // [ExecuteSqlRequest.query_mode][google.spanner.v1.ExecuteSqlRequest.query_mode] and are sent
-  // only once with the last response in the stream.
-  // This field will also be present in the last response for DML
-  // statements.
+  // [ExecuteSqlRequest.query_mode][google.spanner.v1.ExecuteSqlRequest.query_mode]
+  // and are sent only once with the last response in the stream. This field
+  // will also be present in the last response for DML statements.
   ResultSetStats stats = 5;
 }
 
-// Metadata about a [ResultSet][google.spanner.v1.ResultSet] or [PartialResultSet][google.spanner.v1.PartialResultSet].
+// Metadata about a [ResultSet][google.spanner.v1.ResultSet] or
+// [PartialResultSet][google.spanner.v1.PartialResultSet].
 message ResultSetMetadata {
   // Indicates the field names and types for the rows in the result
   // set.  For example, a SQL query like `"SELECT UserId, UserName FROM
@@ -177,9 +178,11 @@ message ResultSetMetadata {
   Transaction transaction = 2;
 }
 
-// Additional statistics about a [ResultSet][google.spanner.v1.ResultSet] or [PartialResultSet][google.spanner.v1.PartialResultSet].
+// Additional statistics about a [ResultSet][google.spanner.v1.ResultSet] or
+// [PartialResultSet][google.spanner.v1.PartialResultSet].
 message ResultSetStats {
-  // [QueryPlan][google.spanner.v1.QueryPlan] for the query associated with this result.
+  // [QueryPlan][google.spanner.v1.QueryPlan] for the query associated with this
+  // result.
   QueryPlan query_plan = 1;
 
   // Aggregated statistics from the execution of the query. Only present when
diff --git a/spanner/google/cloud/spanner_v1/proto/spanner.proto b/spanner/google/cloud/spanner_v1/proto/spanner.proto
index 7d3de6ad771e..7a01fb5e9dc3 100644
--- a/spanner/google/cloud/spanner_v1/proto/spanner.proto
+++ b/spanner/google/cloud/spanner_v1/proto/spanner.proto
@@ -33,7 +33,6 @@ option java_outer_classname = "SpannerProto";
 option java_package = "com.google.spanner.v1";
 option php_namespace = "Google\\Cloud\\Spanner\\V1";
 
-
 // Cloud Spanner API
 //
 // The Cloud Spanner API can be used to manage sessions and execute
@@ -95,10 +94,12 @@ service Spanner {
   //
   // Operations inside read-write transactions might return `ABORTED`. If
   // this occurs, the application should restart the transaction from
-  // the beginning. See [Transaction][google.spanner.v1.Transaction] for more details.
+  // the beginning. See [Transaction][google.spanner.v1.Transaction] for more
+  // details.
   //
   // Larger result sets can be fetched in streaming fashion by calling
-  // [ExecuteStreamingSql][google.spanner.v1.Spanner.ExecuteStreamingSql] instead.
+  // [ExecuteStreamingSql][google.spanner.v1.Spanner.ExecuteStreamingSql]
+  // instead.
   rpc ExecuteSql(ExecuteSqlRequest) returns (ResultSet) {
     option (google.api.http) = {
       post: "/v1/{session=projects/*/instances/*/databases/*/sessions/*}:executeSql"
@@ -106,11 +107,11 @@ service Spanner {
     };
   }
 
-  // Like [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql], except returns the result
-  // set as a stream. Unlike [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql], there
-  // is no limit on the size of the returned result set. However, no
-  // individual row in the result set can exceed 100 MiB, and no
-  // column value can exceed 10 MiB.
+  // Like [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql], except returns the
+  // result set as a stream. Unlike
+  // [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql], there is no limit on
+  // the size of the returned result set. However, no individual row in the
+  // result set can exceed 100 MiB, and no column value can exceed 10 MiB.
   rpc ExecuteStreamingSql(ExecuteSqlRequest) returns (stream PartialResultSet) {
     option (google.api.http) = {
       post: "/v1/{session=projects/*/instances/*/databases/*/sessions/*}:executeStreamingSql"
@@ -120,14 +121,15 @@ service Spanner {
 
   // Reads rows from the database using key lookups and scans, as a
   // simple key/value style alternative to
-  // [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql].  This method cannot be used to
-  // return a result set larger than 10 MiB; if the read matches more
+  // [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql].  This method cannot be
+  // used to return a result set larger than 10 MiB; if the read matches more
   // data than that, the read fails with a `FAILED_PRECONDITION`
   // error.
   //
   // Reads inside read-write transactions might return `ABORTED`. If
   // this occurs, the application should restart the transaction from
-  // the beginning. See [Transaction][google.spanner.v1.Transaction] for more details.
+  // the beginning. See [Transaction][google.spanner.v1.Transaction] for more
+  // details.
   //
   // Larger result sets can be yielded in streaming fashion by calling
   // [StreamingRead][google.spanner.v1.Spanner.StreamingRead] instead.
@@ -138,9 +140,9 @@ service Spanner {
     };
   }
 
-  // Like [Read][google.spanner.v1.Spanner.Read], except returns the result set as a
-  // stream. Unlike [Read][google.spanner.v1.Spanner.Read], there is no limit on the
-  // size of the returned result set. However, no individual row in
+  // Like [Read][google.spanner.v1.Spanner.Read], except returns the result set
+  // as a stream. Unlike [Read][google.spanner.v1.Spanner.Read], there is no
+  // limit on the size of the returned result set. However, no individual row in
   // the result set can exceed 100 MiB, and no column value can exceed
   // 10 MiB.
   rpc StreamingRead(ReadRequest) returns (stream PartialResultSet) {
@@ -151,7 +153,8 @@ service Spanner {
   }
 
   // Begins a new transaction. This step can often be skipped:
-  // [Read][google.spanner.v1.Spanner.Read], [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] and
+  // [Read][google.spanner.v1.Spanner.Read],
+  // [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] and
   // [Commit][google.spanner.v1.Spanner.Commit] can begin a new transaction as a
   // side-effect.
   rpc BeginTransaction(BeginTransactionRequest) returns (Transaction) {
@@ -178,8 +181,9 @@ service Spanner {
 
   // Rolls back a transaction, releasing any locks it holds. It is a good
   // idea to call this for any transaction that includes one or more
-  // [Read][google.spanner.v1.Spanner.Read] or [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] requests and
-  // ultimately decides not to commit.
+  // [Read][google.spanner.v1.Spanner.Read] or
+  // [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] requests and ultimately
+  // decides not to commit.
   //
   // `Rollback` returns `OK` if it successfully aborts the transaction, the
   // transaction was already aborted, or the transaction is not
@@ -193,10 +197,11 @@ service Spanner {
 
   // Creates a set of partition tokens that can be used to execute a query
   // operation in parallel.  Each of the returned partition tokens can be used
-  // by [ExecuteStreamingSql][google.spanner.v1.Spanner.ExecuteStreamingSql] to specify a subset
-  // of the query result to read.  The same session and read-only transaction
-  // must be used by the PartitionQueryRequest used to create the
-  // partition tokens and the ExecuteSqlRequests that use the partition tokens.
+  // by [ExecuteStreamingSql][google.spanner.v1.Spanner.ExecuteStreamingSql] to
+  // specify a subset of the query result to read.  The same session and
+  // read-only transaction must be used by the PartitionQueryRequest used to
+  // create the partition tokens and the ExecuteSqlRequests that use the
+  // partition tokens.
   //
   // Partition tokens become invalid when the session used to create them
   // is deleted, is idle for too long, begins a new transaction, or becomes too
@@ -211,12 +216,13 @@ service Spanner {
 
   // Creates a set of partition tokens that can be used to execute a read
   // operation in parallel.  Each of the returned partition tokens can be used
-  // by [StreamingRead][google.spanner.v1.Spanner.StreamingRead] to specify a subset of the read
-  // result to read.  The same session and read-only transaction must be used by
-  // the PartitionReadRequest used to create the partition tokens and the
-  // ReadRequests that use the partition tokens.  There are no ordering
-  // guarantees on rows returned among the returned partition tokens, or even
-  // within each individual StreamingRead call issued with a partition_token.
+  // by [StreamingRead][google.spanner.v1.Spanner.StreamingRead] to specify a
+  // subset of the read result to read.  The same session and read-only
+  // transaction must be used by the PartitionReadRequest used to create the
+  // partition tokens and the ReadRequests that use the partition tokens.  There
+  // are no ordering guarantees on rows returned among the returned partition
+  // tokens, or even within each individual StreamingRead call issued with a
+  // partition_token.
   //
   // Partition tokens become invalid when the session used to create them
   // is deleted, is idle for too long, begins a new transaction, or becomes too
@@ -280,7 +286,8 @@ message ListSessionsRequest {
   int32 page_size = 2;
 
   // If non-empty, `page_token` should contain a
-  // [next_page_token][google.spanner.v1.ListSessionsResponse.next_page_token] from a previous
+  // [next_page_token][google.spanner.v1.ListSessionsResponse.next_page_token]
+  // from a previous
   // [ListSessionsResponse][google.spanner.v1.ListSessionsResponse].
   string page_token = 3;
 
@@ -303,8 +310,8 @@ message ListSessionsResponse {
   repeated Session sessions = 1;
 
   // `next_page_token` can be sent in a subsequent
-  // [ListSessions][google.spanner.v1.Spanner.ListSessions] call to fetch more of the matching
-  // sessions.
+  // [ListSessions][google.spanner.v1.Spanner.ListSessions] call to fetch more
+  // of the matching sessions.
   string next_page_token = 2;
 }
 
@@ -370,7 +377,8 @@ message ExecuteSqlRequest {
 
   // It is not always possible for Cloud Spanner to infer the right SQL type
   // from a JSON value.  For example, values of type `BYTES` and values
-  // of type `STRING` both appear in [params][google.spanner.v1.ExecuteSqlRequest.params] as JSON strings.
+  // of type `STRING` both appear in
+  // [params][google.spanner.v1.ExecuteSqlRequest.params] as JSON strings.
   //
   // In these cases, `param_types` can be used to specify the exact
   // SQL type for some or all of the SQL statement parameters. See the
@@ -380,15 +388,18 @@ message ExecuteSqlRequest {
 
   // If this request is resuming a previously interrupted SQL statement
   // execution, `resume_token` should be copied from the last
-  // [PartialResultSet][google.spanner.v1.PartialResultSet] yielded before the interruption. Doing this
-  // enables the new SQL statement execution to resume where the last one left
-  // off. The rest of the request parameters must exactly match the
-  // request that yielded this token.
+  // [PartialResultSet][google.spanner.v1.PartialResultSet] yielded before the
+  // interruption. Doing this enables the new SQL statement execution to resume
+  // where the last one left off. The rest of the request parameters must
+  // exactly match the request that yielded this token.
   bytes resume_token = 6;
 
   // Used to control the amount of debugging information returned in
-  // [ResultSetStats][google.spanner.v1.ResultSetStats]. If [partition_token][google.spanner.v1.ExecuteSqlRequest.partition_token] is set, [query_mode][google.spanner.v1.ExecuteSqlRequest.query_mode] can only
-  // be set to [QueryMode.NORMAL][google.spanner.v1.ExecuteSqlRequest.QueryMode.NORMAL].
+  // [ResultSetStats][google.spanner.v1.ResultSetStats]. If
+  // [partition_token][google.spanner.v1.ExecuteSqlRequest.partition_token] is
+  // set, [query_mode][google.spanner.v1.ExecuteSqlRequest.query_mode] can only
+  // be set to
+  // [QueryMode.NORMAL][google.spanner.v1.ExecuteSqlRequest.QueryMode.NORMAL].
   QueryMode query_mode = 7;
 
   // If present, results will be restricted to the specified partition
@@ -449,7 +460,8 @@ message PartitionQueryRequest {
   // then unions all results.
   //
   // This must not contain DML commands, such as INSERT, UPDATE, or
-  // DELETE. Use [ExecuteStreamingSql][google.spanner.v1.Spanner.ExecuteStreamingSql] with a
+  // DELETE. Use
+  // [ExecuteStreamingSql][google.spanner.v1.Spanner.ExecuteStreamingSql] with a
   // PartitionedDml transaction for large, partition-friendly DML operations.
   string sql = 3;
 
@@ -471,7 +483,8 @@ message PartitionQueryRequest {
 
   // It is not always possible for Cloud Spanner to infer the right SQL type
   // from a JSON value.  For example, values of type `BYTES` and values
-  // of type `STRING` both appear in [params][google.spanner.v1.PartitionQueryRequest.params] as JSON strings.
+  // of type `STRING` both appear in
+  // [params][google.spanner.v1.PartitionQueryRequest.params] as JSON strings.
   //
   // In these cases, `param_types` can be used to specify the exact
   // SQL type for some or all of the SQL query parameters. See the
@@ -495,18 +508,24 @@ message PartitionReadRequest {
   // Required. The name of the table in the database to be read.
   string table = 3;
 
-  // If non-empty, the name of an index on [table][google.spanner.v1.PartitionReadRequest.table]. This index is
-  // used instead of the table primary key when interpreting [key_set][google.spanner.v1.PartitionReadRequest.key_set]
-  // and sorting result rows. See [key_set][google.spanner.v1.PartitionReadRequest.key_set] for further information.
+  // If non-empty, the name of an index on
+  // [table][google.spanner.v1.PartitionReadRequest.table]. This index is used
+  // instead of the table primary key when interpreting
+  // [key_set][google.spanner.v1.PartitionReadRequest.key_set] and sorting
+  // result rows. See [key_set][google.spanner.v1.PartitionReadRequest.key_set]
+  // for further information.
   string index = 4;
 
-  // The columns of [table][google.spanner.v1.PartitionReadRequest.table] to be returned for each row matching
-  // this request.
+  // The columns of [table][google.spanner.v1.PartitionReadRequest.table] to be
+  // returned for each row matching this request.
   repeated string columns = 5;
 
   // Required. `key_set` identifies the rows to be yielded. `key_set` names the
-  // primary keys of the rows in [table][google.spanner.v1.PartitionReadRequest.table] to be yielded, unless [index][google.spanner.v1.PartitionReadRequest.index]
-  // is present. If [index][google.spanner.v1.PartitionReadRequest.index] is present, then [key_set][google.spanner.v1.PartitionReadRequest.key_set] instead names
+  // primary keys of the rows in
+  // [table][google.spanner.v1.PartitionReadRequest.table] to be yielded, unless
+  // [index][google.spanner.v1.PartitionReadRequest.index] is present. If
+  // [index][google.spanner.v1.PartitionReadRequest.index] is present, then
+  // [key_set][google.spanner.v1.PartitionReadRequest.key_set] instead names
   // index keys in [index][google.spanner.v1.PartitionReadRequest.index].
   //
   // It is not an error for the `key_set` to name rows that do not
@@ -549,24 +568,31 @@ message ReadRequest {
   // Required. The name of the table in the database to be read.
   string table = 3;
 
-  // If non-empty, the name of an index on [table][google.spanner.v1.ReadRequest.table]. This index is
-  // used instead of the table primary key when interpreting [key_set][google.spanner.v1.ReadRequest.key_set]
-  // and sorting result rows. See [key_set][google.spanner.v1.ReadRequest.key_set] for further information.
+  // If non-empty, the name of an index on
+  // [table][google.spanner.v1.ReadRequest.table]. This index is used instead of
+  // the table primary key when interpreting
+  // [key_set][google.spanner.v1.ReadRequest.key_set] and sorting result rows.
+  // See [key_set][google.spanner.v1.ReadRequest.key_set] for further
+  // information.
   string index = 4;
 
-  // The columns of [table][google.spanner.v1.ReadRequest.table] to be returned for each row matching
-  // this request.
+  // The columns of [table][google.spanner.v1.ReadRequest.table] to be returned
+  // for each row matching this request.
   repeated string columns = 5;
 
   // Required. `key_set` identifies the rows to be yielded. `key_set` names the
-  // primary keys of the rows in [table][google.spanner.v1.ReadRequest.table] to be yielded, unless [index][google.spanner.v1.ReadRequest.index]
-  // is present. If [index][google.spanner.v1.ReadRequest.index] is present, then [key_set][google.spanner.v1.ReadRequest.key_set] instead names
-  // index keys in [index][google.spanner.v1.ReadRequest.index].
-  //
-  // If the [partition_token][google.spanner.v1.ReadRequest.partition_token] field is empty, rows are yielded
-  // in table primary key order (if [index][google.spanner.v1.ReadRequest.index] is empty) or index key order
-  // (if [index][google.spanner.v1.ReadRequest.index] is non-empty).  If the [partition_token][google.spanner.v1.ReadRequest.partition_token] field is not
-  // empty, rows will be yielded in an unspecified order.
+  // primary keys of the rows in [table][google.spanner.v1.ReadRequest.table] to
+  // be yielded, unless [index][google.spanner.v1.ReadRequest.index] is present.
+  // If [index][google.spanner.v1.ReadRequest.index] is present, then
+  // [key_set][google.spanner.v1.ReadRequest.key_set] instead names index keys
+  // in [index][google.spanner.v1.ReadRequest.index].
+  //
+  // If the [partition_token][google.spanner.v1.ReadRequest.partition_token]
+  // field is empty, rows are yielded in table primary key order (if
+  // [index][google.spanner.v1.ReadRequest.index] is empty) or index key order
+  // (if [index][google.spanner.v1.ReadRequest.index] is non-empty).  If the
+  // [partition_token][google.spanner.v1.ReadRequest.partition_token] field is
+  // not empty, rows will be yielded in an unspecified order.
   //
   // It is not an error for the `key_set` to name rows that do not
   // exist in the database. Read yields nothing for nonexistent rows.
@@ -579,9 +605,9 @@ message ReadRequest {
 
   // If this request is resuming a previously interrupted read,
   // `resume_token` should be copied from the last
-  // [PartialResultSet][google.spanner.v1.PartialResultSet] yielded before the interruption. Doing this
-  // enables the new read to resume where the last read left off. The
-  // rest of the request parameters must exactly match the request
+  // [PartialResultSet][google.spanner.v1.PartialResultSet] yielded before the
+  // interruption. Doing this enables the new read to resume where the last read
+  // left off. The rest of the request parameters must exactly match the request
   // that yielded this token.
   bytes resume_token = 9;
 
@@ -592,7 +618,8 @@ message ReadRequest {
   bytes partition_token = 10;
 }
 
-// The request for [BeginTransaction][google.spanner.v1.Spanner.BeginTransaction].
+// The request for
+// [BeginTransaction][google.spanner.v1.Spanner.BeginTransaction].
 message BeginTransactionRequest {
   // Required. The session in which the transaction runs.
   string session = 1;
diff --git a/spanner/google/cloud/spanner_v1/proto/spanner_pb2_grpc.py b/spanner/google/cloud/spanner_v1/proto/spanner_pb2_grpc.py
index 6609aeb76cf5..85106b9a6254 100644
--- a/spanner/google/cloud/spanner_v1/proto/spanner_pb2_grpc.py
+++ b/spanner/google/cloud/spanner_v1/proto/spanner_pb2_grpc.py
@@ -156,21 +156,23 @@ def ExecuteSql(self, request, context):
 
     Operations inside read-write transactions might return `ABORTED`. If
     this occurs, the application should restart the transaction from
-    the beginning. See [Transaction][google.spanner.v1.Transaction] for more details.
+    the beginning. See [Transaction][google.spanner.v1.Transaction] for more
+    details.
 
     Larger result sets can be fetched in streaming fashion by calling
-    [ExecuteStreamingSql][google.spanner.v1.Spanner.ExecuteStreamingSql] instead.
+    [ExecuteStreamingSql][google.spanner.v1.Spanner.ExecuteStreamingSql]
+    instead.
     """
         context.set_code(grpc.StatusCode.UNIMPLEMENTED)
         context.set_details("Method not implemented!")
         raise NotImplementedError("Method not implemented!")
 
     def ExecuteStreamingSql(self, request, context):
-        """Like [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql], except returns the result
-    set as a stream. Unlike [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql], there
-    is no limit on the size of the returned result set. However, no
-    individual row in the result set can exceed 100 MiB, and no
-    column value can exceed 10 MiB.
+        """Like [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql], except returns the
+    result set as a stream. Unlike
+    [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql], there is no limit on
+    the size of the returned result set. However, no individual row in the
+    result set can exceed 100 MiB, and no column value can exceed 10 MiB.
     """
         context.set_code(grpc.StatusCode.UNIMPLEMENTED)
         context.set_details("Method not implemented!")
@@ -179,14 +181,15 @@ def ExecuteStreamingSql(self, request, context):
     def Read(self, request, context):
         """Reads rows from the database using key lookups and scans, as a
     simple key/value style alternative to
-    [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql].  This method cannot be used to
-    return a result set larger than 10 MiB; if the read matches more
+    [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql].  This method cannot be
+    used to return a result set larger than 10 MiB; if the read matches more
     data than that, the read fails with a `FAILED_PRECONDITION`
     error.
 
     Reads inside read-write transactions might return `ABORTED`. If
     this occurs, the application should restart the transaction from
-    the beginning. See [Transaction][google.spanner.v1.Transaction] for more details.
+    the beginning. See [Transaction][google.spanner.v1.Transaction] for more
+    details.
 
     Larger result sets can be yielded in streaming fashion by calling
     [StreamingRead][google.spanner.v1.Spanner.StreamingRead] instead.
@@ -196,9 +199,9 @@ def Read(self, request, context):
         raise NotImplementedError("Method not implemented!")
 
     def StreamingRead(self, request, context):
-        """Like [Read][google.spanner.v1.Spanner.Read], except returns the result set as a
-    stream. Unlike [Read][google.spanner.v1.Spanner.Read], there is no limit on the
-    size of the returned result set. However, no individual row in
+        """Like [Read][google.spanner.v1.Spanner.Read], except returns the result set
+    as a stream. Unlike [Read][google.spanner.v1.Spanner.Read], there is no
+    limit on the size of the returned result set. However, no individual row in
     the result set can exceed 100 MiB, and no column value can exceed
     10 MiB.
     """
@@ -208,7 +211,8 @@ def StreamingRead(self, request, context):
 
     def BeginTransaction(self, request, context):
         """Begins a new transaction. This step can often be skipped:
-    [Read][google.spanner.v1.Spanner.Read], [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] and
+    [Read][google.spanner.v1.Spanner.Read],
+    [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] and
     [Commit][google.spanner.v1.Spanner.Commit] can begin a new transaction as a
     side-effect.
     """
@@ -233,8 +237,9 @@ def Commit(self, request, context):
     def Rollback(self, request, context):
         """Rolls back a transaction, releasing any locks it holds. It is a good
     idea to call this for any transaction that includes one or more
-    [Read][google.spanner.v1.Spanner.Read] or [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] requests and
-    ultimately decides not to commit.
+    [Read][google.spanner.v1.Spanner.Read] or
+    [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] requests and ultimately
+    decides not to commit.
 
     `Rollback` returns `OK` if it successfully aborts the transaction, the
     transaction was already aborted, or the transaction is not
@@ -247,10 +252,11 @@ def Rollback(self, request, context):
     def PartitionQuery(self, request, context):
         """Creates a set of partition tokens that can be used to execute a query
     operation in parallel.  Each of the returned partition tokens can be used
-    by [ExecuteStreamingSql][google.spanner.v1.Spanner.ExecuteStreamingSql] to specify a subset
-    of the query result to read.  The same session and read-only transaction
-    must be used by the PartitionQueryRequest used to create the
-    partition tokens and the ExecuteSqlRequests that use the partition tokens.
+    by [ExecuteStreamingSql][google.spanner.v1.Spanner.ExecuteStreamingSql] to
+    specify a subset of the query result to read.  The same session and
+    read-only transaction must be used by the PartitionQueryRequest used to
+    create the partition tokens and the ExecuteSqlRequests that use the
+    partition tokens.
 
     Partition tokens become invalid when the session used to create them
     is deleted, is idle for too long, begins a new transaction, or becomes too
@@ -264,12 +270,13 @@ def PartitionQuery(self, request, context):
     def PartitionRead(self, request, context):
         """Creates a set of partition tokens that can be used to execute a read
     operation in parallel.  Each of the returned partition tokens can be used
-    by [StreamingRead][google.spanner.v1.Spanner.StreamingRead] to specify a subset of the read
-    result to read.  The same session and read-only transaction must be used by
-    the PartitionReadRequest used to create the partition tokens and the
-    ReadRequests that use the partition tokens.  There are no ordering
-    guarantees on rows returned among the returned partition tokens, or even
-    within each individual StreamingRead call issued with a partition_token.
+    by [StreamingRead][google.spanner.v1.Spanner.StreamingRead] to specify a
+    subset of the read result to read.  The same session and read-only
+    transaction must be used by the PartitionReadRequest used to create the
+    partition tokens and the ReadRequests that use the partition tokens.  There
+    are no ordering guarantees on rows returned among the returned partition
+    tokens, or even within each individual StreamingRead call issued with a
+    partition_token.
 
     Partition tokens become invalid when the session used to create them
     is deleted, is idle for too long, begins a new transaction, or becomes too
diff --git a/spanner/google/cloud/spanner_v1/proto/transaction.proto b/spanner/google/cloud/spanner_v1/proto/transaction.proto
index e7fafc0e7655..7253bcbe0044 100644
--- a/spanner/google/cloud/spanner_v1/proto/transaction.proto
+++ b/spanner/google/cloud/spanner_v1/proto/transaction.proto
@@ -27,7 +27,6 @@ option java_outer_classname = "TransactionProto";
 option java_package = "com.google.spanner.v1";
 option php_namespace = "Google\\Cloud\\Spanner\\V1";
 
-
 // # Transactions
 //
 //
@@ -185,7 +184,8 @@ option php_namespace = "Google\\Cloud\\Spanner\\V1";
 // reads should be executed within a transaction or at an exact read
 // timestamp.
 //
-// See [TransactionOptions.ReadOnly.strong][google.spanner.v1.TransactionOptions.ReadOnly.strong].
+// See
+// [TransactionOptions.ReadOnly.strong][google.spanner.v1.TransactionOptions.ReadOnly.strong].
 //
 // ### Exact Staleness
 //
@@ -206,7 +206,9 @@ option php_namespace = "Google\\Cloud\\Spanner\\V1";
 // equivalent boundedly stale concurrency modes. On the other hand,
 // boundedly stale reads usually return fresher results.
 //
-// See [TransactionOptions.ReadOnly.read_timestamp][google.spanner.v1.TransactionOptions.ReadOnly.read_timestamp] and
+// See
+// [TransactionOptions.ReadOnly.read_timestamp][google.spanner.v1.TransactionOptions.ReadOnly.read_timestamp]
+// and
 // [TransactionOptions.ReadOnly.exact_staleness][google.spanner.v1.TransactionOptions.ReadOnly.exact_staleness].
 //
 // ### Bounded Staleness
@@ -236,7 +238,9 @@ option php_namespace = "Google\\Cloud\\Spanner\\V1";
 // which rows will be read, it can only be used with single-use
 // read-only transactions.
 //
-// See [TransactionOptions.ReadOnly.max_staleness][google.spanner.v1.TransactionOptions.ReadOnly.max_staleness] and
+// See
+// [TransactionOptions.ReadOnly.max_staleness][google.spanner.v1.TransactionOptions.ReadOnly.max_staleness]
+// and
 // [TransactionOptions.ReadOnly.min_read_timestamp][google.spanner.v1.TransactionOptions.ReadOnly.min_read_timestamp].
 //
 // ### Old Read Timestamps and Garbage Collection
@@ -308,14 +312,10 @@ option php_namespace = "Google\\Cloud\\Spanner\\V1";
 message TransactionOptions {
   // Message type to initiate a read-write transaction. Currently this
   // transaction type has no options.
-  message ReadWrite {
-
-  }
+  message ReadWrite {}
 
   // Message type to initiate a Partitioned DML transaction.
-  message PartitionedDml {
-
-  }
+  message PartitionedDml {}
 
   // Message type to initiate a read-only transaction.
   message ReadOnly {
@@ -381,7 +381,8 @@ message TransactionOptions {
     }
 
     // If true, the Cloud Spanner-selected read timestamp is included in
-    // the [Transaction][google.spanner.v1.Transaction] message that describes the transaction.
+    // the [Transaction][google.spanner.v1.Transaction] message that describes
+    // the transaction.
     bool return_read_timestamp = 6;
   }
 
@@ -435,7 +436,8 @@ message Transaction {
 // [Read][google.spanner.v1.Spanner.Read] or
 // [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] call runs.
 //
-// See [TransactionOptions][google.spanner.v1.TransactionOptions] for more information about transactions.
+// See [TransactionOptions][google.spanner.v1.TransactionOptions] for more
+// information about transactions.
 message TransactionSelector {
   // If no fields are set, the default is a single use transaction
   // with strong concurrency.
@@ -450,7 +452,8 @@ message TransactionSelector {
 
     // Begin a new transaction and execute this read or SQL query in
     // it. The transaction ID of the new transaction is returned in
-    // [ResultSetMetadata.transaction][google.spanner.v1.ResultSetMetadata.transaction], which is a [Transaction][google.spanner.v1.Transaction].
+    // [ResultSetMetadata.transaction][google.spanner.v1.ResultSetMetadata.transaction],
+    // which is a [Transaction][google.spanner.v1.Transaction].
     TransactionOptions begin = 3;
   }
 }
diff --git a/spanner/google/cloud/spanner_v1/proto/type.proto b/spanner/google/cloud/spanner_v1/proto/type.proto
index de5203dd5f9f..1ddbd62be56c 100644
--- a/spanner/google/cloud/spanner_v1/proto/type.proto
+++ b/spanner/google/cloud/spanner_v1/proto/type.proto
@@ -25,23 +25,25 @@ option java_outer_classname = "TypeProto";
 option java_package = "com.google.spanner.v1";
 option php_namespace = "Google\\Cloud\\Spanner\\V1";
 
-
 // `Type` indicates the type of a Cloud Spanner value, as might be stored in a
 // table cell or returned from an SQL query.
 message Type {
   // Required. The [TypeCode][google.spanner.v1.TypeCode] for this type.
   TypeCode code = 1;
 
-  // If [code][google.spanner.v1.Type.code] == [ARRAY][google.spanner.v1.TypeCode.ARRAY], then `array_element_type`
-  // is the type of the array elements.
+  // If [code][google.spanner.v1.Type.code] ==
+  // [ARRAY][google.spanner.v1.TypeCode.ARRAY], then `array_element_type` is the
+  // type of the array elements.
   Type array_element_type = 2;
 
-  // If [code][google.spanner.v1.Type.code] == [STRUCT][google.spanner.v1.TypeCode.STRUCT], then `struct_type`
-  // provides type information for the struct's fields.
+  // If [code][google.spanner.v1.Type.code] ==
+  // [STRUCT][google.spanner.v1.TypeCode.STRUCT], then `struct_type` provides
+  // type information for the struct's fields.
   StructType struct_type = 3;
 }
 
-// `StructType` defines the fields of a [STRUCT][google.spanner.v1.TypeCode.STRUCT] type.
+// `StructType` defines the fields of a
+// [STRUCT][google.spanner.v1.TypeCode.STRUCT] type.
 message StructType {
   // Message representing a single field of a struct.
   message Field {
@@ -61,9 +63,9 @@ message StructType {
   // The list of fields that make up this struct. Order is
   // significant, because values of this struct type are represented as
   // lists, where the order of field values matches the order of
-  // fields in the [StructType][google.spanner.v1.StructType]. In turn, the order of fields
-  // matches the order of columns in a read request, or the order of
-  // fields in the `SELECT` clause of a query.
+  // fields in the [StructType][google.spanner.v1.StructType]. In turn, the
+  // order of fields matches the order of columns in a read request, or the
+  // order of fields in the `SELECT` clause of a query.
   repeated Field fields = 1;
 }
 
@@ -109,7 +111,8 @@ enum TypeCode {
   BYTES = 7;
 
   // Encoded as `list`, where the list elements are represented
-  // according to [array_element_type][google.spanner.v1.Type.array_element_type].
+  // according to
+  // [array_element_type][google.spanner.v1.Type.array_element_type].
   ARRAY = 8;
 
   // Encoded as `list`, where list element `i` is represented according
diff --git a/spanner/synth.metadata b/spanner/synth.metadata
index 175cf419174d..49b0a1ddbf59 100644
--- a/spanner/synth.metadata
+++ b/spanner/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-02-20T18:16:07.456385Z",
+  "updateTime": "2019-02-26T13:25:33.405783Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.16.13",
-        "dockerImage": "googleapis/artman@sha256:5fd9aee1d82a00cebf425c8fa431f5457539562f5867ad9c54370f0ec9a7ccaa"
+        "version": "0.16.14",
+        "dockerImage": "googleapis/artman@sha256:f3d61ae45abaeefb6be5f228cda22732c2f1b00fb687c79c4bd4f2c42bb1e1a7"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "18ab81eec27942a942622d5a8d9c9e7a202e8c16",
-        "internalRef": "234814197"
+        "sha": "29f098cb03a9983cc9cb15993de5da64419046f2",
+        "internalRef": "235621085"
       }
     },
     {