tests/test-gendoc-sv.t

phabricator: add a config knob to import in the secret phase

For my use anyway, it's better to have a config knob that's always set than to
try to remember a switch.  But we can add a tristate switch if desired.

Differential Revision: https://phab.mercurial-scm.org/D8137

#require docutils gettext

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