Not sure if we need the regex replace for trailing spaces after a comma.
I didn't see any difference if I bumped the magic "90" to "99" and then `slice()`ed the array to only 2 elements.
We could probably shorten to `grunt.log.write(JSON.stringify(goodLocales, null, 2));`, unless we wanted to force the `goodLocales[]` to appear on a single line (if that is the preferred format for config.json or puppet configs.