Fix @override quick-fix to respect doc comments.

pkg/analysis_server/lib/src/services/correction/fix_internal.dart

Index: pkg/analysis_server/lib/src/services/correction/fix_internal.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
index 78fb2c427ed67076278948f3d86ddb0c338a513a..dc66c4507cf10a21a13bc34615905fef6e3bb430 100644
--- a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
+++ b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
@@ -2213,9 +2213,18 @@ class FixProcessor {
     if (member == null) {
       return;
     }
-    exitPosition = new Position(file, member.offset - 1);
+
+    //TODO(pq): migrate annotation edit building to change_builder
+
+    // Handle doc comments.
+    Token token = member.beginToken;
+    if (token is CommentToken) {
+      token = (token as CommentToken).parent;
+    }
+
+    exitPosition = new Position(file, token.offset - 1);
     String indent = utils.getIndent(1);
-    _addReplaceEdit(rf.rangeStartLength(member, 0), '@override$eol$indent');
+    _addReplaceEdit(rf.rangeStartLength(token, 0), '@override$eol$indent');
     _addFix(DartFixKind.LINT_ADD_OVERRIDE, []);
   }