Bug 1209523 - Fix parse error during grunt build

As part of my work to get grunt build running automatically on deploy,
I'm going to run it on Travis to make sure we catch things like this
before deploy :-)

ui/partials/main/thShortcutTable.html

@@ -4,7 +4,7 @@
       <a ng-show="onscreenShortcutsShowing"
          ng-click="setOnscreenShortcutsShowing(false)"
          class="pull-right" href="" title="Close this help">
-        <span class="fa fa-times lightgray"</span>
+        <span class="fa fa-times lightgray"></span>
       </a>
     </h3>
   </div>