diff -r 4101fab78314 -r d1d8e97d32af tests/test-evolve-obshistory.t
--- a/tests/test-evolve-obshistory.t	Wed Oct 16 11:10:04 2019 -0700
+++ b/tests/test-evolve-obshistory.t	Mon Nov 04 14:31:08 2019 -0800
@@ -168,3 +168,12 @@
        [evolve.verb|rewritten](description) as [evolve.node|fdf9bde5129a] using [evolve.operation|amend] by [evolve.user|test] [evolve.date|(Thu Jan 01 00:00:00 1970 +0000)]
          (No patch available, successor is unknown locally)
   
+
+  $ hg obslog 7a230b46bf61 --graph \
+  > -T '{node} {rev} {desc|firstline}\n{markers % "rewritten using {operation}"}\n'
+  o  7a230b46bf61 2 A2
+  |
+  x  fdf9bde5129a
+  |  rewritten using amend
+  @  471f378eab4c 1 A0
+     rewritten using amend