I pushed cleanup-2.patch (after a minor rebase). Sorry for breaking "hg annotation" on Include/abstract.h: I hope that it will be less annoying that the giant "replace tabs with space" made by Antoine Pitrou a few years ago which modified almost all .c and .h files (my change only changes a single file, abstract.h). If you have large pending patch series which modify this file, ping me, I will help you to rebase them.

Sorry, I didn't expect this issue to be so painful. I hope that abstract.h is now more readable, easier to maintain (no more surprising indentation!), and have better comments. I now started to cleanup the documentation of functions of the "PyObject_Call() family": see my first issue #28977. I think that we should then synchronize .rst doc and .h comments to make them consistent again (and maybe update the doc).