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Thanks for the patch.
 
- This function returns a file-like object with two additional methods from
+ This function returns a file-like object that supports the Context Manager 
+ protocol, with two additional methods from
The capitalization seems unneeded to me. Also, in my opinion saying "file-like" implies support for the context manager protocol, even if not all file-likes do, and anyway not all users share my assumption. What do you think about this wording:
 This function returns a file-like object that works as a :term:`context manager`
 and has two additional methods from the :mod:`urllib.response` module
The term role creates a link to the glossary. (BTW the entry for context manager could be improved to give open as example; I’ll do that.)
+It is also possible to achieve the same result using a context manager
+approach. ::
I would rather use with statements everywhere, or if it makes sense to have examples both with and without with, to put the example with with first.