--- a/mercurial/help.py	Sat Oct 13 09:03:08 2018 -0400
+++ b/mercurial/help.py	Sat Oct 13 10:09:12 2018 +0200
@@ -338,7 +338,7 @@
             aliases, entry = cmdutil.findcmd(name, commands.table,
                                              strict=unknowncmd)
         except error.AmbiguousCommand as inst:
-            # py3k fix: except vars can't be used outside the scope of the
+            # py3 fix: except vars can't be used outside the scope of the
             # except block, nor can be used inside a lambda. python issue4617
             prefix = inst.args[0]
             select = lambda c: cmdutil.parsealiases(c)[0].startswith(prefix)