Kacper Walanus

@amatsuda Not really. I wanted you to merge my another [PR](https://github.com/amatsuda/html5_validators/pull/20) first (you just did). But I have something different. On my own fork I did [simple handling](https://github.com/oxfordvp/html5_validators/commit/04bfcbae55a89df825e1b72fd62e1a782a138cfd) of `:if`...