typo fixes - https://github.com/vlajos/misspell_fixer
diff --git a/python/mox.py b/python/mox.py
index ce80ba5..257468e 100755
--- a/python/mox.py
+++ b/python/mox.py
@@ -31,7 +31,7 @@
 parameters) is called, then an exception will be raised.
 
 Once you are done interacting with the mock, you need to verify that
-all the expected interactions occured.  (Maybe your code exited
+all the expected interactions occurred.  (Maybe your code exited
 prematurely without calling some cleanup method!)  The verify phase
 ensures that every expected method was called; otherwise, an exception
 will be raised.