tests/bzr-definitions

formatter: populate ctx from repo and node value

This will basically replace the fm.contexthint() API. I originally thought
this would be too complicated, and I wrote 8399438bc7ef "formatter: provide
hint of context keys required by template" because of that. However, I had
to add a similar mechanism for fctx templates, and the overall machinery
became way simpler than my original patch.

The test output slightly changed as {author} is no longer available in
the {manifest} context, which isn't the point this test targeted on.

# this file holds the definitions that are used in various bzr tests

TERM=dumb; export TERM
echo '[extensions]' >> $HGRCPATH
echo 'convert = ' >> $HGRCPATH

glog()
{
    hg log -G --template '{rev}@{branch} "{desc|firstline}" files+: [{file_adds}], files-: [{file_dels}], files: [{file_mods}]\n' "$@"
}

manifest()
{
    echo "% manifest of $2"
    hg -R $1 manifest -v -r $2
}