bug#55768: 26.3; isearch highlighting in dired

[Juri Linkov <juri@linkov.net>]

>> (invisible-p (point)) has already been tested in the previous line, but it only tests that
>> there is a text property, not actual invisibility:
>> (defun invisible-p (pos)
>>   (get-text-property pos 'invisible))
>
> That's not the definition of invisible-p.  It's
>
> DEFUN ("invisible-p", Finvisible_p, Sinvisible_p, 1, 1, 0,
>        doc: /* Non-nil if text properties at POS cause text there to be currently invisible.

I checked this again, and I see nothing wrong in the current implementation:

  (invisible-p (get-text-property (point) 'invisible))

is a valid call, because the arg of ‘invisible-p’ can be the actual value
of the ‘invisible’ text property.