tests/test-gendoc-da.t

githelp: recommend `hg import` for `git am`

This referenced a third party extension. It doesn't feel appropriate
to do that from a core extension. Reference `hg import` instead.

Differential Revision: https://phab.mercurial-scm.org/D1724

#require docutils gettext

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