--- a/hgext/histedit.py	Sat Nov 21 22:04:09 2015 +0200
+++ b/hgext/histedit.py	Sat Nov 21 17:40:26 2015 +0200
@@ -1126,7 +1126,7 @@
     rules = '\n'.join([makedesc(repo, act, rev) for [act, rev] in rules])
     rules += '\n\n'
     rules += editcomment
-    rules = ui.edit(rules, ui.username())
+    rules = ui.edit(rules, ui.username(), {'prefix': 'histedit'})
 
     # Save edit rules in .hg/histedit-last-edit.txt in case
     # the user needs to ask for help after something