tests/test-gendoc

verify: fix "missing revlog!" errors for revlog format v0 and add test

With revlog format v0 the .d files are empty if the only revision stored is an
empty file. Since Mercurial can no longer create format v0 repositories, but
still use it, add a script which creates a repository with a single empty file.
This can be used in other tests if wanted.

#!/bin/sh

"$TESTDIR/hghave" docutils || exit 80

HGENCODING=UTF-8
export HGENCODING

for PO in C $TESTDIR/../i18n/*.po; do
    LOCALE=`basename $PO .po`
    echo
    echo "% extracting documentation from $LOCALE"
    echo ".. -*- coding: utf-8 -*-" > gendoc-$LOCALE.txt
    echo "" >> gendoc-$LOCALE.txt
    LC_ALL=$LOCALE python $TESTDIR/../doc/gendoc.py >> gendoc-$LOCALE.txt || exit

    # We call runrst without adding "--halt warning" to make it report
    # all errors instead of stopping on the first one.
    echo "checking for parse errors"
    python $TESTDIR/../doc/runrst html gendoc-$LOCALE.txt /dev/null
done