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Subject: |
24.5; toggle-truncate-lines not mentioned in docstring for truncate-lines nor in elisp manual |
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Date: |
Mon, 4 Jan 2016 10:30:17 +0100 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:38.0) Gecko/20100101 Thunderbird/38.5.0 |
In general, changing the value of `truncate-lines' should be done via
`toggle-truncate-lines' not by `(setq truncate-lines ..)'
However the documentation string for `truncate-lines' does not mention
the existence of `toggle-truncate-lines', nor is it mentioned in the
elisp manual (section "37.3 Truncation").
It seems that modifying `truncate-lines' with just `(setq ..)' may
suffer from redisplay problems, see
http://emacs.stackexchange.com/questions/19228 for a way to trip the
problem from emacs -Q.
--phs
In GNU Emacs 24.5.1 (x86_64-apple-darwin13.4.0, NS apple-appkit-1265.21)
of 2015-04-10 on builder10-9.porkrind.org
Windowing system distributor `Apple', version 10.3.1404
Configured using:
`configure --with-ns '--enable-locallisppath=/Library/Application
Support/Emacs/${version}/site-lisp:/Library/Application
Support/Emacs/site-lisp''
Important settings:
value of $LC_ALL: en_US
value of $LANG: en_US
locale-coding-system: utf-8-unix
--
Philippe SCHNOEBELEN, www.lsv.ens-cachan.fr/~phs
LSV, CNRS UMR 8643 & ENS de Cachan Tel: (+33/0) 147 407 530
"Algebraic symbols are used when you do not know what you are talking about"
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--- Begin Message ---
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Subject: |
Re: bug#22303: 24.5; toggle-truncate-lines not mentioned in docstring for truncate-lines nor in elisp manual |
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Date: |
Mon, 04 Jan 2016 19:11:31 +0200 |
> From: phs <address@hidden>
> Date: Mon, 4 Jan 2016 10:30:17 +0100
>
> In general, changing the value of `truncate-lines' should be done via
> `toggle-truncate-lines' not by `(setq truncate-lines ..)'
>
> However the documentation string for `truncate-lines' does not mention
> the existence of `toggle-truncate-lines', nor is it mentioned in the
> elisp manual (section "37.3 Truncation").
>
> It seems that modifying `truncate-lines' with just `(setq ..)' may
> suffer from redisplay problems, see
> http://emacs.stackexchange.com/questions/19228 for a way to trip the
> problem from emacs -Q.
Thanks for pointing this out.
The answers on stackexchange are incorrect: there's nothing wrong with
setting 'truncate-lines' directly. The situation described there
revealed a bug, which I just fixed for the next release.
I see no need to change the documentation in this regard.
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