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.
Sometimes, pkgutil will return actual files (usually .nib files) as if they were part of the directory. Microsoft Office is an example of this: in a recent update the file `/Library/Application Support/Microsoft/MAU2.0/Microsoft AutoUpdate.app/Contents/SharedSupport/Microsoft Error Reporting.app/Contents/Resources/en.lproj/MainWindowAlt.nib` was returning from `/usr/sbin/pkgutil --only-dirs --files com.microsoft.package.component` even though it should have been a file instead of a directory. This caused the `rmdir` command to fail.
This patch will check if we are trying to delete a “directory” that is really a “file” - and if we are, we just delete the file instead. This will allow packages that get in this state to be uninstalled. A unit test which can be run using `brew cask-tests` is also included.
