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bug#13949: 24.4.1; `fill-paragraph' should not always put the buffer as
From: |
Eli Zaretskii |
Subject: |
bug#13949: 24.4.1; `fill-paragraph' should not always put the buffer as modified |
Date: |
Tue, 22 Mar 2016 18:15:33 +0200 |
> From: Jaakov <j_k_v@ro.ru>
> Date: Tue, 22 Mar 2016 11:50:08 +0100
>
> > fill-paragraph first removes all the newlines from the paragraph, and
> > then inserts only as many as needed to get a filled paragraph. So the
> > buffer gets changed at least twice in the process.
>
> This is _how_ it is done, not _what_ is done. Then "what" is described in the
> documentation
>
> https://www.gnu.org/software/emacs/manual/html_node/elisp/Buffer-Modification.html
> :
>
> "Emacs keeps a flag called the modified flag for each buffer, to record
> whether you have changed the text of the buffer. This flag is set to t
> whenever you alter the contents of the buffer, and cleared to nil when you
> save it."
>
> The description of fill-paragraph at
>
> http://www.gnu.org/software/emacs/manual/html_node/emacs/Fill-Commands.html
>
> mentions no exception to the above and "Emacs always behaved like that" is
> just saying that the issue is old.
>
> Since fill-paragraph does not heed the above piece of
> "modified"-flag--documentation, it represents a non-compliance with the
> (informal) specification, i.e., a typical bug.
>
> Therefore, I changed the severity from wishlist to normal.
I disagree. I think Dani is right: the buffer text is changed (at
least twice), which turns on the modified flag. This situation is
equivalent to inserting a character and then deleting it: the buffer
stays modified, although its text is identical to the original one.
Therefore, this is still a wishlist request for a new feature, not a
bug. Patches to implement such a feature are welcome.
Thanks.
- bug#13949: 24.4.1; `fill-paragraph' should not always put the buffer as modified, Jaakov, 2016/03/22
- bug#13949: 24.4.1; `fill-paragraph' should not always put the buffer as modified, Andreas Röhler, 2016/03/22
- bug#13949: 24.4.1; `fill-paragraph' should not always put the buffer as modified,
Eli Zaretskii <=
- bug#13949: 24.4.1; `fill-paragraph' should not always put the buffer as modified, Eli Zaretskii, 2016/03/22
- bug#13949: 24.4.1; `fill-paragraph' should not always put the buffer as modified, Jaakov, 2016/03/22
- bug#13949: 24.4.1; `fill-paragraph' should not always put the buffer as modified, John Wiegley, 2016/03/26
- bug#13949: 24.4.1; `fill-paragraph' should not always put the buffer as modified, Óscar Fuentes, 2016/03/26
- bug#13949: 24.4.1; `fill-paragraph' should not always put the buffer as modified, Andreas Röhler, 2016/03/27
- bug#13949: 24.4.1; `fill-paragraph' should not always put the buffer as modified, Óscar Fuentes, 2016/03/27