The title pretty much says it all.  I believe the behavior is correct (more useful than returning an object that is only useful for obtaining the name) even though it is unusual for context managers.  In any case there is plenty of code using the existing behavior, so I think this is a doc bug.

I misread the docs.  They aren't wrong, but it is still the case that they don't mention that the directory name is what you get on entry to the context, which is what led to my confusion.  

Here's a patch.

Change looks fine to me - go ahead and commit it :)

I don't understand a phrase "and is assigned to the target of the as clause on entry to a context". Typo?

The patch is missing the markup for the 'as' keyword (it should read :keyword:`as`).  If that were added, would the sentence make sense to you?  Would it be clearer to say that the directory name is returned by the __enter__ method?

Aha, now it makes a sense to me.

I don't know which variant will be clear.

bump?

New changeset b5fe07d39e16 by R David Murray in branch '3.3':
#14515: clarify that TemporaryDirectory's __enter__ returns the name.
http://hg.python.org/cpython/rev/b5fe07d39e16

New changeset 7b7e17723787 by R David Murray in branch 'default':
#14515: clarify that TemporaryDirectory's __enter__ returns the name.
http://hg.python.org/cpython/rev/7b7e17723787

Just ran into this again :).  Committed a patch with wording clarified based on Serhiy's feedback (I say 'target of the as clause of the with statement'.)