- Add a (large) speedup by moving some logic to Bash for the typical
case of a normal or dev-cmd, Bash or Ruby command.
- Make `brew command` a non-developer command, I don't think it makes
sense to consider it something needed for developing Homebrew.
- Update the manpage/tests/RBI accordingly.
Co-authored-by: Carlo Cabrera <30379873+carlocab@users.noreply.github.com>
