jessevdk/go-flags — pull request #114 by shirayu (2014-11-07 11:01:09+00:00)
Title: Accept any single character arguments including ``-``

Many programs such as ``sort`` and ``cat`` treat the single character argument ``-`` as the special file name for the standard input or the standard output.
It is better to accept ``-`` in order to specify them by simply using ``-`` as the argument, though it starts with ``-``.