formatting fixes

Library/Homebrew/build.rb

Library/Homebrew/cask/artifact/abstract_artifact.rb

Library/Homebrew/cask/cmd/doctor.rb

Library/Homebrew/cask/dsl/caveats.rb

Library/Homebrew/cask/exceptions.rb

Library/Homebrew/cmd/sh.rb

Library/Homebrew/dev-cmd/edit.rb

Library/Homebrew/development_tools.rb

...ebrew/extend/os/linux/requirements/osxfuse_requirement.rb

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

Library/Homebrew/formula.rb

Library/Homebrew/migrator.rb

Library/Homebrew/missing_formula.rb

Library/Homebrew/os/mac.rb

Library/Homebrew/os/mac/xcode.rb

Library/Homebrew/tap.rb