py3: use '%s' instead of %r in hgext/convert/subversion.py Using '%r' on bytes in python 3 adds b'' prefixes to output which is bad. I don't see a reason why we want to repr() the string here, so just switched to '%s'. This fixes some output failure in one of the subversion test. Differential Revision: https://phab.mercurial-scm.org/D5026