--- a/hgext3rd/evolve/cmdrewrite.py	Fri Jul 12 08:20:24 2019 -0700
+++ b/hgext3rd/evolve/cmdrewrite.py	Fri Jul 12 23:00:11 2019 -0700
@@ -182,10 +182,7 @@
     while newnode is None:
         fp.seek(0)
         previous_patch = fp.getvalue()
-        if 5 <= len(ui.edit.im_func.func_defaults):
-            newpatch = ui.edit(fp.getvalue(), old.user(), action="diff")
-        else:
-            newpatch = ui.edit(fp.getvalue(), old.user())
+        newpatch = ui.edit(fp.getvalue(), old.user(), action="diff")
 
         afp = stringio()
         afp.write(newpatch)