tests/test-gendoc-sv.t

templater: restore the original string format of {date}

Unfortunately, python-hglib relies on that. I could fix python-hglib, but
there would be other tools that take a decimal separator as the separator
of unixtime and tzoffset.

The showfmt is set per instance since new code uses '%d %d' format by default.

#require docutils gettext

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