mercurial/util.py

--- a/mercurial/util.py	Fri Aug 28 12:18:12 2015 -0400
+++ b/mercurial/util.py	Fri Aug 28 10:53:55 2015 -0400
@@ -2260,7 +2260,7 @@
 
 class hooks(object):
     '''A collection of hook functions that can be used to extend a
-    function's behaviour. Hooks are called in lexicographic order,
+    function's behavior. Hooks are called in lexicographic order,
     based on the names of their sources.'''
 
     def __init__(self):