bug#33567: Syntactic fontification of diff hunks

[Dmitry Gutov]

On 19.12.2018 2:11, Juri Linkov wrote:

> Neither GitHub nor GitLab have foreground green/red colors, only background
> green/red colors.

Speaking of GitHub and GitLab, I wonder if we should take another cue 
from them and tone down our background colors as well.

This makes the new diffs more readable for me:

(eval-after-load 'diff-mode
  '(progn
     (set-face-background 'diff-added "#eeffee")
     (set-face-background 'diff-removed "#ffeeee")
     (set-face-background 'diff-refine-added "#d0ffd0")
     (set-face-background 'diff-refine-removed "#ffd0d0")
     ))