The collation seems to go wrong (e.g. the first entry of the Index of library names is now "is-callable-from"). Maybe we need to remove the markup from the sort order somehow? But it seems ot have already been broken before.

Oh well.

@tkoeppe , do you have a specific example? It doesn't seem to matter in the cases I looked at (e.g. elements_view::iterator / sentinel).

I think this is a pre-existing problem, indeed. Let me take a quick look.

Hm, this requires a separate fix, so it's unrelated to this patch.