Fix lint error in JSDoc

Change-Id: I175e782ec822c1965152e79b9e85cbc730b1b8c4
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-builder/gr-diff-builder.html b/polygerrit-ui/app/elements/diff/gr-diff-builder/gr-diff-builder.html
index 3ad7c74..0a595c7 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-builder/gr-diff-builder.html
+++ b/polygerrit-ui/app/elements/diff/gr-diff-builder/gr-diff-builder.html
@@ -394,7 +394,7 @@
         },
 
         /**
-         * @returns {Boolean} whether any of the lines in _groups are longer
+         * @return {Boolean} whether any of the lines in _groups are longer
          * than SYNTAX_MAX_LINE_LENGTH.
          */
         _anyLineTooLong: function() {