--- a/mercurial/help.py	Mon Feb 26 23:54:40 2018 +0530
+++ b/mercurial/help.py	Sat Feb 17 11:19:52 2018 -0700
@@ -197,6 +197,8 @@
     return loader
 
 internalstable = sorted([
+    (['bundle2'], _('Bundle2'),
+     loaddoc('bundle2', subdir='internals')),
     (['bundles'], _('Bundles'),
      loaddoc('bundles', subdir='internals')),
     (['censor'], _('Censor'),