he files to the patterns.

*patterns* (:class:`~collections.abc.Iterable` of :class:`~pathspec.pattern.Pattern`)
contains the patterns to use.

*files* (:class:`~collections.abc.Iterable` of :class:`str`) contains
the normalized file paths to be matched against *patterns*.

Returns the matched files (:class:`set` of :class:`str`).
z".match_files() is deprecated. Use z-.match_file() with a loop for better results.rs