diff --git a/django/utils/cache.py b/django/utils/cache.py
index 5eba302ebe..c8031a409a 100644
--- a/django/utils/cache.py
+++ b/django/utils/cache.py
@@ -86,7 +86,7 @@ def patch_response_headers(response, cache_timeout=None):
 
 def add_never_cache_headers(response):
     """
-    Add headers to a response to indicate that 
+    Add headers to a response to indicate that
     a page should never be cached.
     """
     patch_response_headers(response, cache_timeout=-1)
diff --git a/django/utils/datastructures.py b/django/utils/datastructures.py
index dbf8660c75..2b19c06dfb 100644
--- a/django/utils/datastructures.py
+++ b/django/utils/datastructures.py
@@ -16,9 +16,9 @@ class MergeDict(object):
 
     def __contains__(self, key):
         return self.has_key(key)
-        
-    def __copy__(self): 
-        return self.__class__(*self.dicts) 
+
+    def __copy__(self):
+        return self.__class__(*self.dicts)
 
     def get(self, key, default=None):
         try:
@@ -45,9 +45,9 @@ class MergeDict(object):
             if dict.has_key(key):
                 return True
         return False
-        
-    def copy(self): 
-        """ returns a copy of this object""" 
+
+    def copy(self):
+        """ returns a copy of this object"""
         return self.__copy__()
 
 class SortedDict(dict):
diff --git a/django/utils/synch.py b/django/utils/synch.py
index 6fcd81390e..2e808c1e01 100644
--- a/django/utils/synch.py
+++ b/django/utils/synch.py
@@ -1,6 +1,6 @@
 """
 Synchronization primitives:
-    
+
     - reader-writer lock (preference to writers)
 
 (Contributed to Django by eugene@lazutkin.com)
@@ -14,17 +14,16 @@ except ImportError:
 class RWLock:
     """
     Classic implementation of reader-writer lock with preference to writers.
-    
+
     Readers can access a resource simultaneously.
     Writers get an exclusive access.
-    
+
     API is self-descriptive:
         reader_enters()
         reader_leaves()
         writer_enters()
         writer_leaves()
     """
-    
     def __init__(self):
         self.mutex     = threading.RLock()
         self.can_read  = threading.Semaphore(0)
@@ -33,7 +32,7 @@ class RWLock:
         self.active_writers  = 0
         self.waiting_readers = 0
         self.waiting_writers = 0
-        
+
     def reader_enters(self):
         self.mutex.acquire()
         try:
@@ -45,7 +44,7 @@ class RWLock:
         finally:
             self.mutex.release()
         self.can_read.acquire()
-        
+
     def reader_leaves(self):
         self.mutex.acquire()
         try:
@@ -56,7 +55,7 @@ class RWLock:
                 self.can_write.release()
         finally:
             self.mutex.release()
-    
+
     def writer_enters(self):
         self.mutex.acquire()
         try:
@@ -68,7 +67,7 @@ class RWLock:
         finally:
             self.mutex.release()
         self.can_write.acquire()
-        
+
     def writer_leaves(self):
         self.mutex.acquire()
         try: