Re: Modify text appearance (put spaces after commas just for display)

[Eli Zaretskii]

> From: Alberto Luaces <aluaces@udc.es>
> Date: Tue, 26 Sep 2017 11:12:15 +0200
> 
> So, from the top of your head, what would be the less painful method to
> change every comma to a comma+space, or at least change the color of the
> commas to anything more distinguishable and attach it to the language
> mode hook?

Here's one more solution for you to consider, a much simpler one IMO:

  (let ((table (or (window-display-table)
                   buffer-display-table
                   (make-display-table))))
    (aset table ?, (vconcat ", "))
    (setq buffer-display-table table))