Re: ASCII-folded search [was: Re: Upcoming loss of usability ...]

[Juri Linkov]

>> It doesn't enable by default, so it could be combined with the same logic
>> like in ‘isearch-toggle-case-fold’.  In any case we have to find a good
>> mnemonic key binding to toggle the new character-folding mode.
>
> I think I'll set it to M-s f. Both c and h are already taken (not sure
> why, but `h' feels mnemonic here) and f is the next best thing I
> think. Or we could use a quote M-s '

‘M-s f’ is already used by dired-isearch-filenames,
whereas ‘M-s '’ has good mnemonics indeed.

So the most important remaining problem is how to combine char-folding
with ‘isearch-lax-whitespace’ and ‘search-whitespace-regexp’.
It seems this will require duplicating some code between these two.