Duti: Yosemite Fix

Closes #33009.
Thanks! I tend to try and go upstream commit/PR > DomT4/scripts patch > inline. Generally, if I can't find an upstream commit to use I'll fall back on leaning on my own repository. I don't know why, but using gists tends to unnerve me a touch. I try not to fall into the habit of using my own repository though, in case I'm hit by a bus or something and suddenly a host of patches need replacing.