I've put the draft documentation on the SF tracker, as Patch ID #1234057 .
The version posted there has a few changes from the last draft I mailed to the list, including:
- mention try/finally, then describe with statements as a way to eliminate the associated boilerplate - clean up some terminology issues in the opening section that were holdovers from the 'suite management' version - switch to contextmanager as the decorator name - a couple of name changes in the contextmanager sample code - a few minor editiorial fixes
It still needs addition of latex formatting codes.
I also kept the enter/exit terminology, since that is the only one Guido has given blessing to (by approving PEP 343 using those method names)