rubocop: brew style --fix autocorrections.

Library/Homebrew/cask/cmd.rb

Library/Homebrew/cask/cmd/abstract_command.rb

Library/Homebrew/cask/cmd/internal_stanza.rb

Library/Homebrew/download_strategy.rb

Library/Homebrew/extend/os/linux/hardware/cpu.rb

Library/Homebrew/formula.rb

Library/Homebrew/formula_installer.rb

Library/Homebrew/keg.rb

Library/Homebrew/requirement.rb

Library/Homebrew/rubocops/cask/homepage_matches_url.rb

Library/Homebrew/rubocops/cask/mixin/on_homepage_stanza.rb

Library/Homebrew/rubocops/cask/stanza_grouping.rb

Library/Homebrew/rubocops/cask/stanza_order.rb

Library/Homebrew/rubocops/extend/formula.rb