Tweaked patch.py for Py3 compatibility.

 - Legacy-Id: 17916

Author: levkowetz

ietf/utils/patch.py

@@ -699,8 +699,8 @@ def _normalize_filenames(self):
     for i,p in enumerate(self.items):
       if debugmode:
         debug("    patch type = " + p.type)
-        debug("    source = " + p.source)
-        debug("    target = " + p.target)
+        debug("    source = " + str(p.source))
+        debug("    target = " + str(p.target))
       if p.type in (HG, GIT):
         # TODO: figure out how to deal with /dev/null entries
         debug("stripping a/ and b/ prefixes")