Rename ExecutableFile.offset to ExecutableFile.kind and fix documentation.

pkg/analysis_server/test/integration/protocol_matchers.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script
 // "pkg/analysis_server/spec/generate_files".
 
 /**
  * Matchers for data types defined in the analysis server API
@@ skipping 1114 matching lines @@
   "UNIT_TEST_GROUP",
   "UNIT_TEST_TEST",
   "UNKNOWN"
 ]);
 
 /**
  * ExecutableFile
  *
  * {
  *   "file": FilePath
- *   "offset": ExecutableKind
+ *   "kind": ExecutableKind
  * }
  */
 final Matcher isExecutableFile = new LazyMatcher(() => new MatchesJsonObject(
   "ExecutableFile", {
     "file": isFilePath,
-    "offset": isExecutableKind
+    "kind": isExecutableKind
   }));
 
 /**
  * ExecutableKind
  *
  * enum {
  *   CLIENT
  *   EITHER
  *   SERVER
  * }
@@ skipping 762 matching lines @@
  *
  * {
  *   "newName": String
  * }
  */
 final Matcher isRenameOptions = new LazyMatcher(() => new MatchesJsonObject(
   "rename options", {
     "newName": isString
   }));