Fix couple hints.

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

Index: pkg/analysis_server/lib/src/provisional/completion/dart/completion_target.dart
diff --git a/pkg/analysis_server/lib/src/provisional/completion/dart/completion_target.dart b/pkg/analysis_server/lib/src/provisional/completion/dart/completion_target.dart
index 7e7ae5cb97189d10d70c5ef170eea38fe99f44e2..9e998e07fbd026c700ddeb186fd9b700f805ea66 100644
--- a/pkg/analysis_server/lib/src/provisional/completion/dart/completion_target.dart
+++ b/pkg/analysis_server/lib/src/provisional/completion/dart/completion_target.dart
@@ -199,14 +199,14 @@ class CompletionTarget {
             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);