Escape the title when writing YAML front matter in a new post
Escape the title when writing YAML front matter in a new post

This means that titles with colons (e.g. "TIL: A new fact!") don't cause
the YAML parser to be sad when you built the site.

alexwlchan/alexwlchan.net,alexwlchan/alexwlchan.net,alexwlchan/alexwlchan.net,alexwlchan/alexwlchan.net,alexwlchan/alexwlchan.net