On the [Built-in Exceptions](https://docs.python.org/dev/library/exceptions.html) page, the exception [InterruptedError](https://docs.python.org/dev/library/exceptions.html#InterruptedError) correlates the error with the errno [EINTR](https://docs.python.org/dev/library/errno.html#errno.EINTR), linking the name `EINTR` with the errno page. This is great, since reading "*corresponds to errno EINTR*" is pointless if you don't know what `EINTR` means. The problem is `InterruptedError` is the only exception that put a link on the errno. All others only have the "correspondes to errno `ERRNO`", without any links, which makes it harder to understand.

The same thing happens on the [errno](https://docs.python.org/dev/library/errno.html). On the section about [errno.EINTR](https://docs.python.org/dev/library/errno.html#errno.EINTR) we have a "see also" box saying "This error is mapped to the exception InterruptedError", with a link to the InterruptedError section on the exceptions page. However, for some reason the "see also" box is only on this specific errno section.

The links should be added on both pages so the great pattern defined by `InterruptedError` and `errno.EINTR` is mantained.

Only 3.8+ for bug fixes.

Thank you, @terry.reedy! Can you point me if this is defined in some written document I can check? Or is it an internal rule everyone kinda finds out by themselves?

Near the bottom of the opening page: https://devguide.python.org/#status-of-python-branches
The meaning of 'status' is explained elsewhere.

Thank you so much! :-)

New changeset a74892cb2168d249d9a8c53fad605a5def9b41d4 by yyyyyyyan in branch 'main':
bpo-41233: Add links to errnos referenced in exceptions docs (GH-21380)
https://github.com/python/cpython/commit/a74892cb2168d249d9a8c53fad605a5def9b41d4

New changeset 3fa800d7a7a405f51e0e8c9b7dac2f2a75c17bb4 by Miss Islington (bot) in branch '3.10':
bpo-41233: Add links to errnos referenced in exceptions docs (GH-21380)
https://github.com/python/cpython/commit/3fa800d7a7a405f51e0e8c9b7dac2f2a75c17bb4

New changeset e47e6ffed36eb1dd82da3bcadf8b45b894ef4ce2 by Miss Islington (bot) in branch '3.9':
bpo-41233: Add links to errnos referenced in exceptions docs (GH-21380)
https://github.com/python/cpython/commit/e47e6ffed36eb1dd82da3bcadf8b45b894ef4ce2

Thanks for the patch!