tests: fix a typo in test-walkrepos.py

tests: fix a typo in test-walkrepos.py

--- a/tests/test-walkrepo.py	Wed Dec 03 13:50:28 2014 -0800
+++ b/tests/test-walkrepo.py	Wed Dec 10 23:46:47 2014 -0500
@@ -41,7 +41,7 @@
     if len(sub2set & reposet) != 1:
         print "sub2set = %r" % (sub2set,)
         print "reposet = %r" % (reposet,)
-        print "sub1set and reposet should have exactly one path in common."
+        print "sub2set and reposet should have exactly one path in common."
     sub3 = pjoin('.', 'circle', 'top1')
     if sym and sub3 not in reposet:
         print "reposet = %r" % (reposet,)