tests/test-gendoc-pt_BR.t

run-tests: handle json.dumps divergence

In py2, json.dumps includes a trailing space after a comma at the
end of lines. The py3 behavior which omits the trailing space is
preferable, so we're going to strip it.

#require docutils gettext

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