chore(grunt-utils): remove unnecessary quotes from minerr_url

The quotes were causing the minerr processing to fail on Windows

Author: petebacondarwin

lib/grunt/utils.js

@@ -148,7 +148,7 @@ module.exports = {
             '--language_in ECMASCRIPT5_STRICT ' +
             '--minerr_pass ' +
             '--minerr_errors ' + errorFileName + ' ' +
-            '--minerr_url \'http://docs.angularjs.org/minerr/\' ' +
+            '--minerr_url http://docs.angularjs.org/minerr/ ' +
             '--source_map_format=V3 ' +
             '--create_source_map ' + mapFile + ' ' +
             '--js ' + file + ' ' +