Why do I get Lexerr:unterminated quote error?

I get this error from time to time when Chrome's Angular Batarang extension is installed. It auto updates itself and sometimes the error is present, sometimes not.

To test this, I just disable Batarang and refresh the app.

ng-show expects expression while {{ }} is just shortcut for ng-bind directive. In your case

<p ng-show="enabled('http://ballentines.herokuapp.com/' + finalist.slug + '.html') === 'novote'">Not voted</p>

should work.