tests/test-gendoc-el.t

debugcommands: use openstorage() in debugdata (BC)

Nothing we're doing here requires a revlog. So use openstorage().

.. bc::

   `hg debugdata` no longer accepts the path to a revlog file.

Differential Revision: https://phab.mercurial-scm.org/D4357

#require docutils gettext

  $ $TESTDIR/check-gendoc el
  checking for parse errors