Index: Doc/library/functions.rst
===================================================================
--- Doc/library/functions.rst	(revision 69432)
+++ Doc/library/functions.rst	(working copy)
@@ -1303,10 +1303,14 @@
    Without arguments, return a dictionary corresponding to the current local symbol
    table.  With a module, class or class instance object as argument (or anything
    else that has a :attr:`__dict__` attribute), returns a dictionary corresponding
-   to the object's symbol table.  The returned dictionary should not be modified:
-   the effects on the corresponding symbol table are undefined. [#]_
+   to the object's symbol table.
 
+   .. warning::
 
+      The returned dictionary should not be modified:
+      the effects on the corresponding symbol table are undefined. [#]_
+
+
 .. function:: xrange([start,] stop[, step])
 
    This function is very similar to :func:`range`, but returns an "xrange object"