bug#12988: [PATCH] RE: bug#12988: isearch fails to persistently indicate case sensitivity

[Drew Adams]

> >  isearch    - case-insensitive
> >  Isearch    - case-sensitive
> >  I search   -                and lax whitespace
> >  I*search   -                and regexp
> >  I* search  -                and lax ws and regexp
> >  ...
> 
> Then word and symbol search need indication too, e.g.:
> 
> <Isearch>     - word search
> _<Isearch_>   - symbol search

Why not?  Or shorter, reflecting syntax-class designator chars:

 Isearchw   - word
 Isearch_   - symbol
 I searchw  - word, lax whitespace
 I search_  - symbol, lax whitespace

(I still think `I SEARCH_' is better than `i search_' for
case-insensitive search.)