Addressed using relative URLs to actually divert to another server & added DocTest strings. Code has been tested on real-world repositories that use relative references but adding tests which do the round trip testing as a standalone has been beyond me.

#!/bin/sh
. $(dirname $0)/common.sh

for b in `hg branches -aq` ; do
    hg co $b || break
    echo verifying $b
    hg svn verify
done