This rule adjustment is experimental in RuboCop as it may double-freeze
objects but this isn't an error (and freezing too much is better than
too little).
Create a new, seperate RuboCop file that uses our RSpec rule
configuration if a specified tap has a `spec` directory.
Also, while we're here, fix up the various rules so that we don't have
any outdated TODOs, disable some rules for good and fix `brew style`
for Homebrew/bundle.
Adjust the rules based on the current codebase. Remove various enable,
disables and default values that are unnecessary. Add more comments
explaining why. Make minor changes needed to enable a few more rules.
Use 124 max line length everywhere. Also, reduce tap max line length to
189 as Homebrew/homebrew-core has that as a maximum now. In future
Homebrew/homebrew-core will also be reduced to 124 maximum line length.
This requires updating to Rubocop 0.49.0 which will require some fixes
to rules, in Homebrew/brew and Homebrew/homebrew-core but opening this
for now so I remember.
Another look at the current Rubocop rules and how they fit with our
existing and desired future style. Almost all of these changes were
automatic. Split some rules between formulae/brew where brew doesn't
have millions of cases that need fixed.