Re-organize prim-lexing.fsi

Author: TIHan

src/utils/prim-lexing.fsi

@@ -9,10 +9,10 @@ type ISourceText =
 
     abstract Item : int -> char with get
 
-    abstract GetLastCharacterPosition : unit -> int * int
-
     abstract GetLines : unit -> string []
 
+    abstract GetLastCharacterPosition : unit -> int * int
+
     abstract Length : int
 
     abstract ContentEquals : ISourceText -> bool