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Highlighting special comment for prog-mode


From: uzibalqa
Subject: Highlighting special comment for prog-mode
Date: Sun, 11 Sep 2022 12:53:32 +0000

I have the following code that highlights lines made from semicolons in the 
case of lisp-interaction-mode.  

(defface special-comment '((t (:background "orange"))))

(font-lock-add-keywords 'lisp-interaction-mode '(("^\\s<\\s<\\s<+$" 0 
'special-comment t)))

But whilst trying to extend this to prog-mode, the highlighting is not taking 
effect.

(font-lock-add-keywords 'prog-mode '(("^\\s<\\s<\\s<+$" 0 'special-comment t)))





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