svnwrap: improve a docstring & a comment. The docstring for SubversionRepo was technically inaccurate; not only do we require Subversion 1.5, but the reference to a required parameter is inaccurate, as the parameter has a default value. (To be fair, relying on the default value is unlikely to work...) Part of a comment in SubversionRepo.revisions() was redundant, and could be removed. No functionality change.

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

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