rubocop: enable Layout/EmptyLineAfterGuardClause.

Library/.rubocop.yml

Library/Homebrew/cache_store.rb

Library/Homebrew/cask/artifact/abstract_uninstall.rb

Library/Homebrew/cask/audit.rb

Library/Homebrew/cask/cmd/automerge.rb

Library/Homebrew/cleanup.rb

Library/Homebrew/cli_parser.rb

Library/Homebrew/cmd/config.rb

Library/Homebrew/cmd/info.rb

Library/Homebrew/config.rb

Library/Homebrew/dev-cmd/audit.rb

Library/Homebrew/dev-cmd/bump-formula-pr.rb

Library/Homebrew/dev-cmd/man.rb

Library/Homebrew/extend/os/linux/dependency_collector.rb

Library/Homebrew/extend/os/mac/diagnostic.rb

Library/Homebrew/help.rb

Library/Homebrew/language/java.rb

Library/Homebrew/os/mac/xcode.rb

Library/Homebrew/system_command.rb

...st/support/helper/spec/shared_context/integration_test.rb