diff -r dfc0fe1541d9 -r ca76e77dd663 mercurial/commands.py
--- a/mercurial/commands.py	Sun Jul 21 18:50:54 2013 +0400
+++ b/mercurial/commands.py	Thu Jul 25 00:54:49 2013 -0500
@@ -3325,7 +3325,7 @@
     """show branch heads
 
     With no arguments, show all open branch heads in the repository.
-    Branch heads are changesets that have no child changesets on the
+    Branch heads are changesets that have no descendants on the
     same branch. They are where development generally takes place and
     are the usual targets for update and merge operations.