Re: Unicode confusables and reordering characters considered harmful, a simple solution

[Gregory Heytings]

> > I tried various of the predefined colors with highlight-regexp, of 
> > course those with a distinct background, and none make any of those 
> > characters more visible.  Not even with a single pixel wide bar.
>
> That's very strange, because I see them even if I make the region span 
> only a single such character.  The default background of the region face 
> is quite pale, and still I see them quite clearly, even with the default 
> light theme.

Here's a screenshot with emacs -Q (current trunk).  I did M-x 
highlight-regexp RET y RET hi-green RET M-x highlight-regexp <regexp with 
all reordering characters> RET hi-green RET.  There's one reordering 
character between each of the "abcdefghij" string.  I zoomed that picture, 
I see absolutely nothing.

reordering.png
Description: PNG image