Re: highlight failed part of isearch input

[Juri Linkov]

> I do think it's important to use a face that is subdued, however, rather
> than the red-foreground face that is the default for trailing space
> highlighting. This should be something gently noticeable, not a blazing
> warning of imminent danger.

Sorry, I forgot that I customized the trailing-whitespace face to pink
long ago, because red is too annoying color.  Therefore, I didn't see
a difference between two features (failed whitespace and other text).

> If you haven't already, please give it a try, and see if you really find it
> annoying for letting you know that the entire search string is a non-match.

There is one inconsistence: when incrementally adding characters to the
search string it highlights one part (only failed) of the search string,
but when repeating the search with the same string from the search ring,
it highlights the whole string.  This is a minor inconsistence, and can
be tolerated if unavoidable.

-- 
Juri Linkov
http://www.jurta.org/emacs/