tests: fix up a couple of minor bytes inconsistencies in run-tests.py

Only in the automatic bisection code, so fortunately nothing major is
amiss. Fixes test-run-tests.t under Python 3.

Differential Revision: https://phab.mercurial-scm.org/D3350

contrib/python3-whitelist

@@ -393,6 +393,7 b' test-revset-dirstate-parents.t'
 test-revset-outgoing.t
 test-rollback.t
 test-run-tests.py
+test-run-tests.t
 test-schemes.t
 test-serve.t
 test-setdiscovery.t

tests/run-tests.py

@@ -2215,10 +2215,11 b' class TextTestRunner(unittest.TextTestRu'
                     'Failed to identify failure point for %s' % test)
                 continue
             dat = m.groupdict()
-            verb = 'broken' if dat['goodbad'] == 'bad' else 'fixed'
+            verb = 'broken' if dat['goodbad'] == b'bad' else 'fixed'
             self.stream.writeln(
                 '%s %s by %s (%s)' % (
-                    test, verb, dat['node'], dat['summary']))
+                    test, verb, dat['node'].decode('ascii'),
+                    dat['summary'].decode('utf8', 'ignore')))
 
     def printtimes(self, times):
         # iolock held by run