Disable completion in comment text.

pkg/analysis_server/lib/src/services/completion/local_reference_contributor.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.
 
 library services.completion.contributor.dart.local;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart' as protocol
     show Element, ElementKind;
 import 'package:analysis_server/plugin/protocol/protocol.dart'
     hide Element, ElementKind;
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
 import 'package:analysis_server/src/services/completion/local_declaration_visitor.dart';
 import 'package:analysis_server/src/services/completion/local_suggestion_builder.dart';
 import 'package:analysis_server/src/services/completion/optype.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart';
 
 /**
  * A contributor for calculating `completion.getSuggestions` request results
  * for the local library in which the completion is requested.
  */
 class LocalReferenceContributor extends DartCompletionContributor {
   @override
   bool computeFast(DartCompletionRequest request) {
+    // Don't suggest in comments.
+    if (request.target.isCommentText) {
+      return true;
+    }
+
     OpType optype = request.optype;
 
     // Collect suggestions from the specific child [AstNode] that contains
     // the completion offset and all of its parents recursively.
     if (!optype.isPrefixed) {
       if (optype.includeReturnValueSuggestions ||
           optype.includeTypeNameSuggestions ||
           optype.includeVoidReturnSuggestions) {
         _LocalVisitor localVisitor =
             new _LocalVisitor(request, request.offset, optype);
@@ skipping 550 matching lines @@
   bool _isVoid(TypeName returnType) {
     if (returnType != null) {
       Identifier id = returnType.name;
       if (id != null && id.name == 'void') {
         return true;
       }
     }
     return false;
   }
 }