bug#51940: 29.0.50; [PATCH] Fontification and indentation in M-x shell and ielm

[Lars Ingebrigtsen]

<miha@kamnitnik.top> writes:

> Thanks for feedback, revised patches attached. I hope I've clarified the
> doc strings this time. I've also made a minor code simplification in the
> fourth patch.

I've now pushed this patch series to Emacs 29 (with some minor
modifications to avoid compilation warnings).