--- a/tests/test-evolve-obshistory-amend-then-fold.t	Fri Aug 03 00:19:47 2018 +0200
+++ b/tests/test-evolve-obshistory-amend-then-fold.t	Fri Aug 03 00:22:50 2018 +0200
@@ -29,7 +29,7 @@
   | x  changeset:   2:0dec01379d3b
   |/   user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
-  |    obsolete:    reworded using amend as 3:b7ea6d14e664
+  |    obsolete:    reworded as b7ea6d14e664
   |    summary:     B0
   |
   o  changeset:   1:471f378eab4c
@@ -57,19 +57,19 @@
   | |  parent:      1:471f378eab4c
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
-  | |  obsolete:    rewritten using fold as 4:eb5a0daa2192
+  | |  obsolete:    rewritten as eb5a0daa2192
   | |  summary:     B1
   | |
   | | x  changeset:   2:0dec01379d3b
   | |/   user:        test
   | |    date:        Thu Jan 01 00:00:00 1970 +0000
-  | |    obsolete:    reworded using amend as 3:b7ea6d14e664
+  | |    obsolete:    reworded as b7ea6d14e664
   | |    summary:     B0
   | |
   | x  changeset:   1:471f378eab4c
   |/   user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
-  |    obsolete:    rewritten using fold as 4:eb5a0daa2192
+  |    obsolete:    rewritten as eb5a0daa2192
   |    summary:     A0
   |
   o  changeset:   0:ea207398892e
@@ -85,7 +85,7 @@
   @    eb5a0daa2192 (4) C0
   |\
   x |  471f378eab4c (1) A0
-   /     rewritten(description, content) as eb5a0daa2192 using fold by test (Thu Jan 01 00:00:00 1970 +0000)
+   /     rewritten(description, content) as eb5a0daa2192 by test (Thu Jan 01 00:00:00 1970 +0000)
   |        diff -r 471f378eab4c -r eb5a0daa2192 changeset-description
   |        --- a/changeset-description
   |        +++ b/changeset-description
@@ -101,11 +101,11 @@
   |
   |
   x  b7ea6d14e664 (3) B1
-  |    rewritten(description, parent, content) as eb5a0daa2192 using fold by test (Thu Jan 01 00:00:00 1970 +0000)
+  |    rewritten(description, parent, content) as eb5a0daa2192 by test (Thu Jan 01 00:00:00 1970 +0000)
   |      (No patch available, changesets rebased)
   |
   x  0dec01379d3b (2) B0
-       rewritten(description) as b7ea6d14e664 using amend by test (Thu Jan 01 00:00:00 1970 +0000)
+       rewritten(description) as b7ea6d14e664 by test (Thu Jan 01 00:00:00 1970 +0000)
          diff -r 0dec01379d3b -r b7ea6d14e664 changeset-description
          --- a/changeset-description
          +++ b/changeset-description
@@ -119,7 +119,7 @@
   @    eb5a0daa2192 (4) C0
   |\
   x |  471f378eab4c (1) A0
-   /     rewritten(description, content) as eb5a0daa2192 using fold by test (Thu Jan 01 00:00:00 1970 +0000)
+   /     rewritten(description, content) as eb5a0daa2192 by test (Thu Jan 01 00:00:00 1970 +0000)
   |        diff -r 471f378eab4c -r eb5a0daa2192 changeset-description
   |        --- a/changeset-description
   |        +++ b/changeset-description
@@ -135,11 +135,11 @@
   |
   |
   x  b7ea6d14e664 (3) B1
-  |    rewritten(description, parent, content) as eb5a0daa2192 using fold by test (Thu Jan 01 00:00:00 1970 +0000)
+  |    rewritten(description, parent, content) as eb5a0daa2192 by test (Thu Jan 01 00:00:00 1970 +0000)
   |      (No patch available, changesets rebased)
   |
   x  0dec01379d3b (2) B0
-       rewritten(description) as b7ea6d14e664 using amend by test (Thu Jan 01 00:00:00 1970 +0000)
+       rewritten(description) as b7ea6d14e664 by test (Thu Jan 01 00:00:00 1970 +0000)
          diff -r 0dec01379d3b -r b7ea6d14e664 changeset-description
          --- a/changeset-description
          +++ b/changeset-description
@@ -168,7 +168,6 @@
                       *, (glob)
                       "content"
                   ],
-                  "operation": "fold",
                   "succnodes": [
                       "eb5a0daa2192"
                   ],
@@ -184,13 +183,12 @@
           "markers": [
               {
                   "date": [
-                      *, (glob)
+                      0.0,
                       0 (glob)
                   ],
                   "effect": [
                       "description"
                   ],
-                  "operation": "amend",
                   "succnodes": [
                       "b7ea6d14e664"
                   ],
@@ -206,14 +204,13 @@
           "markers": [
               {
                   "date": [
-                      *, (glob)
+                      0.0,
                       0 (glob)
                   ],
                   "effect": [
                       "description",
                       "content"
                   ],
-                  "operation": "fold",
                   "succnodes": [
                       "eb5a0daa2192"
                   ],