Merge pull request #2186 from zemanel/master

Fixed typo on docstring

django/core/files/storage.py

@@ -97,7 +97,7 @@ class Storage(object):
 
     def exists(self, name):
         """
-        Returns True if a file referened by the given name already exists in the
+        Returns True if a file referenced by the given name already exists in the
         storage system, or False if the name is available for a new file.
         """
         raise NotImplementedError('subclasses of Storage must provide a exists() method')