Since the update, a certain style of formatting code is highlighted with font-lock-warning-face:
How do I turn off this behavior?
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Could it be the theme? I was tweaking [`zop-to-char`](https://github.com/thierryvolpiatto/zop-to-char) yesterday and I don't see that `nil` highlighted in `font-lock-warning-face`: [My screenshot](http://i.imgur.com/nI7ZwX7.png?1). I am also on 24.4. The difference I guess is that I am using `zenburn` theme. And it does highlight `font-lock-warning-face` at places I expect. – Kaushal Modi Oct 31 '14 at 13:15
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It's reproducible with `emacs -Q`. – abo-abo Oct 31 '14 at 13:18
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I can confirm this does happen. I find it useful because it highlights that the return value is not what it seems. – Malabarba Oct 31 '14 at 13:20
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Strange.. why am I not seeing that even on `emacs -Q`? [Screenshot](http://i.imgur.com/YcACYO0.png). Again, I am also using emacs 24.4. – Kaushal Modi Oct 31 '14 at 13:27
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@Malabarba, it highlights red because `nil` isn't on a new line. It's just a text formatting issue. – abo-abo Oct 31 '14 at 13:29
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@Malabarba, does that highlighting happen for you for [this exact code snippet](https://github.com/thierryvolpiatto/zop-to-char/blob/master/zop-to-char.el#L56-60)? – Kaushal Modi Oct 31 '14 at 13:32
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@abo-abo The fact that nil isn't on a newline gives the wrong impression this entire expression returns the return value of `kill-region`. Highlighting the `nil` makes it clear that the expression actually returns nil. – Malabarba Oct 31 '14 at 13:32
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@kaushalmodi Yes. Though my emacs actually identifies itself as 25.0 now, so it might not be in 24.4. – Malabarba Oct 31 '14 at 13:37
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Thanks for confirming that. @abo-abo Are you also on the emacs 25.0 development version? My `C-h` `v` `emacs-version` reads `24.4.8`. – Kaushal Modi Oct 31 '14 at 13:39
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@kaushalmodi Yes, the issue happens for current devel version. – abo-abo Oct 31 '14 at 13:42
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@abo-abo Phew. We can then still rely on `emacs -Q` :) The version needs to then be updated in the question title. – Kaushal Modi Oct 31 '14 at 13:43
1 Answers
8
There are two ways
Redefine lisp--match-hidden-arg:
(defun lisp--match-hidden-arg (limit) nil)
Remove lisp--match-hidden-arg from lisp-cl-font-lock-keywords-2 and lisp-el-font-lock-keywords-2
(setq lisp-el-font-lock-keywords-2
(cl-delete 'lisp--match-hidden-arg lisp-el-font-lock-keywords-2
:key #'car))
Please Do NOT Do That!
The coding style detected by lisp--match-hidden-arg is not very readable.
"... a computer language is not just a way of getting a computer to perform operations, but rather ... it is a novel formal medium for expressing ideas about methodology"
Abelson/Sussman "Structure and Interpretation of Computer Programs".
You write code so that people (and you yourself a year from today!) will read and understand it. Coding conventions serve a purpose. Please think before rejecting them.
