bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`

[Arthur Miller]

Richard Stallman <rms@gnu.org> writes:

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>
>   > If they are equal, why do they need to be distinguished?
>
> If file A adds such a hook, then file B adds one that is the same,
> then you unload file B, testing for "the same hook" would
> leave none.  But A won't work right without its hook.
>
> My scheme would put on two distinct but equivalent hooks,
> then delete one of them, leaving the other in place.
> In some cases, that's what you want.

Ok, I understand now. Yes, indeed, put name tag would be one solution to
the problem. It trades memory for cpu time.