This is a meta issue for fixing broken references in the documentation. I will open a child issues for some groups of modules and finally provide a patch for rest files.

Note that not all the targets should be converted to links.  They should be converted only if the link is useful, and usually redundant links are not necessary (e.g. if the same target is repeated several times in the same paragraph/section).

In such case perhaps links should be explicitly prohibited (with '!' mark).

That's probably not worth it.

Definitely not.

Serhiy, are you planning to work on more patches or can this be closed?

Yes. I have 180 Kb patch which touches 107 files, and this is yet too large for one issue. I will continue split this patch for lesser issues.

And here is a patch with small changes which doesn't worth separated issue.

Looks good, except that buffer doesn't really correspond to bytearray.  No memoryview involved there?

No. BytesWarning is related only to bytes and bytearray.

OK then -- so much the better.

Here is a patch to Sphinx which helped me to search dead internal references. Not all references were fixed by proposed patches.

The -n (nitpicky) option to Sphinx should also report missing references.

> The -n (nitpicky) option to Sphinx should also report missing references.

Great.

New changeset fa7cfbec0d32 by Serhiy Storchaka in branch '2.7':
Issue #18758: Fixed and improved cross-references.
http://hg.python.org/cpython/rev/fa7cfbec0d32

New changeset 907da535ed9d by Serhiy Storchaka in branch '3.3':
Issue #18758: Fixed and improved cross-references.
http://hg.python.org/cpython/rev/907da535ed9d

New changeset 261d9bf0cc2b by Serhiy Storchaka in branch 'default':
Issue #18758: Fixed and improved cross-references.
http://hg.python.org/cpython/rev/261d9bf0cc2b

Thank you Georg for all your reviews.

Only patch for pickle left, and this is not trivial one.

Thank you for all the effort you put into this!