--- a/hgext3rd/evolve/obshistory.py	Fri Jun 16 16:50:11 2017 +0200
+++ b/hgext3rd/evolve/obshistory.py	Fri Jun 16 16:51:31 2017 +0200
@@ -631,8 +631,10 @@
     """
     if not successorset:
         verb = 'pruned'
+    elif len(successorset) == 1:
+        verb = 'rewritten'
     else:
-        verb = 'rewritten'
+        verb = 'split'
     return {'verb': verb}
 
 FORMATSSETSFUNCTIONS = [