Some typos.

--HG--
branch : trunk
diff --git a/jinja2/bccache.py b/jinja2/bccache.py
index de6d2b4..e11bad5 100644
--- a/jinja2/bccache.py
+++ b/jinja2/bccache.py
@@ -236,7 +236,7 @@
 
     (Unfortunately the django cache interface is not compatible because it
     does not support storing binary data, only unicode.  You can however pass
-    the underlaying cache client to the bytecode cache which is available
+    the underlying cache client to the bytecode cache which is available
     as `django.core.cache.cache._client`.)
 
     The minimal interface for the client passed to the constructor is this: