tests/test-gendoc-zh_TW.t

revset: do not rewrite ':y' to '0:y' (issue5385)

That's no longer valid since the revision 0 may be hidden. Bypass validating
the existence of '0' and filter it by spanset.

#require docutils gettext

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