tests/bzr-definitions

tests: add test for "log -r wdir() -p" (issue4871)

The issue has been fixed by 93bcc73df8d5, "cmdutil.changeset_printer: pass
context into showpatch()". This patch adds test to prevent future regression.

# 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: {files}\n' "$@"
}

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