tests/test-gendoc-pt_BR.t

subrepo: avoid opening console window for non-native subrepos on Windows

Prevent annoying command prompt windows popping up when using TortoiseHG with
Git and SVN subrepos by passing creationflags=subprocess.CREATE_NO_WINDOW to
subprocess.Popen.

#require docutils gettext

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