Fix prettify commit hook

[rmisio]

Prettify is installed in this app and configured to execute on a git commit hook via Husky. For me (@rmisio) it's not working. It works if I manually run it, but it just doesn't execute on the commit hook. Let's find out why and fix it. People just aren't going to remember to run it.

[rmisio]

@jjeffryes Can you at least try to see if you can reproduce this (i.e. Prettify is not executed on a git commit)? I want to confirm it's not just something on my machine. If it's not and you want to fix it, please feel fry!