fails:File.expand_path does not replace multiple '/' at the beginning of the path
fails:File.expand_path raises an ArgumentError if the path is not valid
fails:File.expand_path expands ~ENV['USER'] to the user's home directory
fails(windows):File.expand_path expands C:/./dir to C:/dir
windows:File.expand_path converts a pathname to an absolute pathname, Ruby-Talk:18512
windows:File.expand_path converts a pathname to an absolute pathname, using a complete path
windows:File.expand_path raises a TypeError if not passed a String type
windows:File.expand_path does not modify the string argument
windows:File.expand_path returns a String when passed a String subclass
