--- a/hgext3rd/evolve/obshistory.py	Thu Sep 28 21:35:29 2017 +0100
+++ b/hgext3rd/evolve/obshistory.py	Mon Oct 09 19:35:32 2017 +0530
@@ -132,7 +132,7 @@
     succ = successors[0]
 
     if succ not in repo:
-        return False, "succ is unknown locally"
+        return False, "successor is unknown locally"
 
     # Check that both node and succ have the same parents
     nodep1, nodep2 = repo[node].p1(), repo[node].p2()