When a formula was built from source, it should not be removed by
`brew autoremove` as it will take a while to be installed again.
Fixes https://github.com/Homebrew/brew/issues/17433
- Part of trying to reduce the number of `Excludes:` we have in our
RuboCop configs.
- The fixes here all seemed reasonable, with some minimal tweaks for
line length and less floatiness. Apart from `test/dev-cmd/bottle_spec.rb`
where RuboCop wanted to do some ridiculously floaty indentation and there
wasn't an obvious alternative place to break the lines, so I opted for
in-line disables instead.
