fails:File.expand_path converts a pathname to an absolute pathname
fails:File.expand_path converts a pathname to an absolute pathname, Ruby-Talk:18512
fails:File.expand_path keeps trailing dots on absolute pathname
fails:File.expand_path converts a pathname to an absolute pathname, using a complete path
fails:File.expand_path converts a pathname to an absolute pathname, using ~ (home) as base
fails:File.expand_path does not return a frozen string
fails:File.expand_path expand path with
fails:File.expand_path expand_path for commoms unix path  give a full path
fails:File.expand_path does not replace multiple '/' at the beginning of the path
fails:File.expand_path replaces multiple '/' with a single '/'
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:File.expand_path does not expand ~ENV['USER'] when it's not at the start
fails:File.expand_path expands ../foo with ~/dir as base dir to /path/to/user/home/foo
fails:File.expand_path accepts objects that have a #to_path method
fails:File.expand_path raises a TypeError if not passed a String type
fails:File.expand_path expands /./dir to /dir
fails:File.expand_path returns a String in the same encoding as the argument
fails:File.expand_path expands a path when the default external encoding is ASCII-8BIT
fails:File.expand_path expands a path with multi-byte characters
fails:File.expand_path raises an Encoding::CompatibilityError if the external encoding is not compatible
fails:File.expand_path does not modify the string argument
fails:File.expand_path does not modify a HOME string argument
fails:File.expand_path returns a String when passed a String subclass
fails:File.expand_path when HOME is not set raises an ArgumentError when passed '~' if HOME is nil
fails:File.expand_path when HOME is not set raises an ArgumentError when passed '~/' if HOME is nil
fails:File.expand_path when HOME is not set raises an ArgumentError when passed '~' if HOME == ''
