Re: emacs-28 a866674b2a: Fix inaccuracies in "lax search" documentation

[Juri Linkov]

>> +@sc{latin small ligature ff} and the sequence @code{(a)} matches
>> +U+249C @sc{parenthesized latin small letter a}.  Character sequences
>> +that are not identical, but match under character folding are known as
>> +@dfn{equivalent character sequences}.
>
> Should we make `char-fold-to-regexp' into a command and refer to it
> from here? Or add something like `char-fold-show-equivalences'?

A better name would be `describe-char-fold'.  Then in outlines,
the outline heading could show the character with its name,
and the outline body a list of characters it matches, with names.