- We recently deleted a load of old Homebrew/formula-patches patches for
non-existent core formulae
(https://github.com/Homebrew/formula-patches/pull/283). This is a good
action to take. Users should always be able to retrieve the patch once
it's been deleted from the repo, if the formula they continue to use
specifies a git revision to pull from, not just `master`.
- The code to detect `master` formulae was already here, so this adds
another GitHub host to the detection: `raw.githubusercontent.com` as
that's what the current patches that use `master`
(https://github.com/Homebrew/homebrew-core/pull/51329) link to.
- Fixes https://github.com/Homebrew/homebrew-core/issues/51313.
