Fix couple hints.

pkg/analysis_server/lib/src/provisional/completion/dart/completion_target.dart

 // Copyright (c) 2015, 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 analysis_server.src.provisional.completion.dart.completion_target;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
@@ skipping 181 matching lines @@
           if (!_isCandidateToken(entity.endToken, offset)) {
             continue;
           }
 
           // If the node is a candidate target, then we are done.
           if (_isCandidateNode(entity, offset)) {
             // Check to see if the offset is in a preceding comment
             Token commentToken =
                 _getContainingCommentToken(entity.beginToken, offset);
             if (commentToken != null) {
-              entity = commentToken;
               // If the preceding comment is dartdoc token, then update
               // the containing node to be the dartdoc comment.
               // Otherwise completion is not required.
               Comment docComment =
                   _getContainingDocComment(containingNode, commentToken);
               if (docComment != null) {
-                containingNode = docComment;
+                return new CompletionTarget._(
+                    compilationUnit, offset, docComment, commentToken, false);
               } else {
                 return new CompletionTarget._(compilationUnit, offset,
                     compilationUnit, commentToken, true);
               }
             }
             return new CompletionTarget._(
                 compilationUnit, offset, containingNode, entity, false);
           }
 
           // Otherwise, the completion target is somewhere inside the entity,
@@ skipping 203 matching lines @@
       if (param.parameterKind == ParameterKind.NAMED) {
         // TODO(danrubel) handle named parameters
         return false;
       } else {
         return paramType is FunctionType || paramType is FunctionTypeAlias;
       }
     }
     return false;
   }
 }