mix format

Author: josevalim

lib/mix/lib/mix/tasks/format.ex

@@ -144,7 +144,7 @@ defmodule Mix.Tasks.Format do
     * `:modifiers` (charlist) - list of sigil modifiers.
 
     * `:opening_delimiter` (string) - the opening delimiter of the sigil being
-      formatted, e.g. `[`, `"`, or `"""` for a heredoc.
+      formatted, e.g. `[`, `"`, or `\"""` for a heredoc.
 
     * `:extension` (string) - the extension of the file being formatted, e.g. `".md"`.