newforms-admin: Merged from trunk up to [7232]

git-svn-id: http://code.djangoproject.com/svn/django/branches/newforms-admin@7233 bcc190cf-cafb-0310-a4f2-bffc1f526a37

1 files changed, 6 insertions, 2 deletions

diff --git a/django/utils/datastructures.py b/django/utils/datastructures.py
index 82d914000f..4c278c0d8e 100644
--- a/django/utils/datastructures.py
+++ b/django/utils/datastructures.py
@@ -3,7 +3,7 @@ class MergeDict(object):
     A simple class for creating new "virtual" dictionaries that actually look
     up values in more than one dictionary, passed in the constructor.
 
-    If a key appears in more than one of the passed in dictionaries, only the
+    If a key appears in more than one of the given dictionaries, only the
     first occurrence will be used.
     """
     def __init__(self, *dicts):
@@ -145,7 +145,7 @@ class SortedDict(dict):
         """Returns a copy of this object."""
         # This way of initializing the copy means it works for subclasses, too.
         obj = self.__class__(self)
-        obj.keyOrder = self.keyOrder
+        obj.keyOrder = self.keyOrder[:]
         return obj
 
     def __repr__(self):
@@ -155,6 +155,10 @@ class SortedDict(dict):
         """
         return '{%s}' % ', '.join(['%r: %r' % (k, v) for k, v in self.items()])
 
+    def clear(self):
+        super(SortedDict, self).clear()
+        self.keyOrder = []
+
 class MultiValueDictKeyError(KeyError):
     pass