copies: return True instead of filename as it is expected to return boolean As the function documentation says this function should True if we hit a match and False otherwise. And I see that we are not using that returned filename anywhere. Differential Revision: https://phab.mercurial-scm.org/D5964

--- a/mercurial/copies.py	Mon Feb 11 19:41:37 2019 +0300
+++ b/mercurial/copies.py	Thu Feb 14 18:28:27 2019 +0530
@@ -776,7 +776,7 @@
     """
 
     if f1 == f2:
-        return f1 # a match
+        return True # a match
 
     g1, g2 = f1.ancestors(), f2.ancestors()
     try: