I think it should be _filespec_to_fh() since it returns a handle.
Remove trailing whitespace.
[rt.cpan.org 1648] Tk may also tie STDIN to an object.

Tied file handles must be untied before they can be redirected.
Otherwise, as in the case of Tk-wrapped handles, there's no OPEN()
implementation, and the redirection fails.
Another day, another release. Or at least another four hours.  Bump version.