Finish bringing SVN into line with latest version of PEP 343 by getting rid of all remaining references to context objects that I could find. Without a __context__() method context objects no longer exist. Also get test_with working again, and adopt a suggestion from Neal for decimal.Context.get_manager()
diff --git a/Doc/ref/ref7.tex b/Doc/ref/ref7.tex
index 4a23133..b213cb2 100644
--- a/Doc/ref/ref7.tex
+++ b/Doc/ref/ref7.tex
@@ -315,8 +315,8 @@
\versionadded{2.5}
The \keyword{with} statement is used to wrap the execution of a block
-with methods defined by a context manager or \keyword{with} statement context
-object (see section~\ref{context-managers}). This allows common
+with methods defined by a context manager (see
+section~\ref{context-managers}). This allows common
\keyword{try}...\keyword{except}...\keyword{finally} usage patterns to
be encapsulated for convenient reuse.