GNU bug report logs - #31544
texinfo-mode fails to consistently fontify multiline @i{italic text}

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Van L <van <at> scratch.space>
To: bug-gnu-emacs <at> gnu.org
Subject: Emacs 26.1 rc-1 Texinfo View fails to italicize all 6 lines in
 paragraph
Date: Mon, 21 May 2018 21:18:57 +1000

Hello.

In the quotation, the second paragraph should italicize all 6 lines.

That is, the paragraph: ``When I get to the end of a paragraph,…''

The Texinfo View on file emacs-lisp-intro.texi italicizes 2 of 6 lines.

  #+NAME: emacs-lisp-intro.texi
  #+BEGIN_SRC texi -n 827

    An expert programmer who reviewed this text said to me:

    @quotation
    @i{I prefer to learn from reference manuals.  I ``dive into'' each
    paragraph, and ``come up for air'' between paragraphs.}

    @i{When I get to the end of a paragraph, I assume that subject is
    done, finished, that I know everything I need (with the
    possible exception of the case when the next paragraph starts talking
    about it in more detail).  I expect that a well written reference manual
    will not have a lot of redundancy, and that it will have excellent
    pointers to the (one) place where the information I want is.}
    @end quotation

    This introduction is not written for this person!

  #+END_SRC

Message #8 received at 31544 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Van L <van <at> scratch.space>
Cc: 31544 <at> debbugs.gnu.org
Subject: Re: bug#31544: Emacs 26.1 rc-1 Texinfo View fails to italicize all 6
 lines in paragraph
Date: Mon, 21 May 2018 19:23:12 +0300

> From: Van L <van <at> scratch.space>
> Date: Mon, 21 May 2018 21:18:57 +1000
> 
> In the quotation, the second paragraph should italicize all 6 lines.

And it is all in italics in this version:

  https://www.gnu.org/software/emacs/manual/pdf/eintr.pdf

Or maybe I misunderstand your report?

> That is, the paragraph: ``When I get to the end of a paragraph,…''

Not sure I understand this part.

> The Texinfo View on file emacs-lisp-intro.texi italicizes 2 of 6 lines.

What is "Texinfo View"?  If I visit the Texinfo source in Emacs, I
also see the entire quotation italicized.  If that's what you meant by
"Texinfo View", then maybe you are using a version of Emacs other than
26.1-RC1?

Thanks.

Message #11 received at 31544 <at> debbugs.gnu.org (full text, mbox):

From: Van L <van <at> scratch.space>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 31544 <at> debbugs.gnu.org
Subject: Re: bug#31544: Emacs 26.1 rc-1 Texinfo View fails to italicize all 6
 lines in paragraph
Date: Tue, 22 May 2018 09:45:19 +1000

> Eli Zaretskii writes:
> 
> Or maybe I misunderstand your report?
> 
>> That is, the paragraph: ``When I get to the end of a paragraph,…''
> 
> Not sure I understand this part.
> 
>> The Texinfo View on file emacs-lisp-intro.texi italicizes 2 of 6 lines.
> 
> What is "Texinfo View"?  If I visit the Texinfo source in Emacs, I
> also see the entire quotation italicized.  If that's what you meant by
> "Texinfo View", then maybe you are using a version of Emacs other than
> 26.1-RC1?

The line in `list-buffers’ refers to the file, as follows:

: %  emacs-lisp-intro....  765330 Texinfo          /Volumes/2018-s/Sources/GNU/emacs/doc/lispintro/emacs-lisp-intro.texi

if I close the file then see the [(Dired by name)] view of lispintro directory and press `v’ for view over the file `emacs-lisp-intro.texi’ it has [(Texinfo View)] and I use `s-l’ for goto-line 823 and this time only 1 of 6 lines is italicized.

Note, however, if I search down for the leading line to the paragraph instead of goto-line then the whole paragraph is italicized as expected.

See: 

http://emacs.scratch.space/public/.splash-plus-elisp-intro-texi_m.jpg

Screenshot confirms Emacs 26.1 version and inadequate italicization.

Message #14 received at 31544 <at> debbugs.gnu.org (full text, mbox):

From: Richard Stallman <rms <at> gnu.org>
To: Van L <van <at> scratch.space>
Cc: 31544 <at> debbugs.gnu.org
Subject: Re: bug#31544: Emacs 26.1 rc-1 Texinfo View fails to italicize all 6
 lines in paragraph
Date: Mon, 21 May 2018 22:13:58 -0400

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

      > @i{When I get to the end of a paragraph, I assume that subject is
      > done, finished, that I know everything I need (with the
      > possible exception of the case when the next paragraph starts talking
      > about it in more detail).

I think that is not a bug.
We don't follow a rule to write that way.

-- 
Dr Richard Stallman
President, Free Software Foundation (https://gnu.org, https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)

Message #17 received at 31544 <at> debbugs.gnu.org (full text, mbox):

From: Van L <van <at> scratch.space>
To: rms <at> gnu.org
Cc: 31544 <at> debbugs.gnu.org
Subject: Re: bug#31544: Emacs 26.1 rc-1 Texinfo View fails to italicize all 6
 lines in paragraph
Date: Tue, 22 May 2018 12:40:18 +1000

> Richard Stallman writes:
> 
>> about it in more detail).
> 
> I think that is not a bug.
> We don't follow a rule to write that way.

The bug surfaces to occasionally cause the failure to present the content as all italicized within texi file's @i{} block.

Message #20 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: bug-gnu-emacs <at> gnu.org,Van L <van <at> scratch.space>,rms <at> gnu.org
Cc: 31544 <at> debbugs.gnu.org
Subject: Re: bug#31544: Emacs 26.1 rc-1 Texinfo View fails to italicize all
 6	lines in paragraph
Date: Tue, 22 May 2018 07:32:42 +0300

On May 22, 2018 5:40:18 AM GMT+03:00, Van L <van <at> scratch.space> wrote:
> 
> > Richard Stallman writes:
> > 
> >> about it in more detail).
> > 
> > I think that is not a bug.
> > We don't follow a rule to write that way.
> 
> The bug surfaces to occasionally cause the failure to present the
> content as all italicized within texi file's @i{} block.

Thanks, this is unrelated to the manual.  It's some subtle problem with
JIT font-lock in that place.

Message #26 received at 31544 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: van <at> scratch.space, 31544 <at> debbugs.gnu.org, rms <at> gnu.org
Subject: Re: bug#31544: Emacs 26.1 rc-1 Texinfo View fails to italicize all
 6	lines in paragraph
Date: Mon, 28 May 2018 18:42:14 -0400

retitle 31544 texinfo-mode fails to consistently fontify multiline @i{italic text}
severity 31544 minor
tags 31544 + confirmed
quit

Eli Zaretskii <eliz <at> gnu.org> writes:

> On May 22, 2018 5:40:18 AM GMT+03:00, Van L <van <at> scratch.space> wrote:
>> 
>> The bug surfaces to occasionally cause the failure to present the
>> content as all italicized within texi file's @i{} block.
>
> Thanks, this is unrelated to the manual.  It's some subtle problem with
> JIT font-lock in that place.

I think the problem is that texinfo-mode doesn't follow the advice in
`(elisp) Multiline Font Lock'.

Message #35 received at 31544 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Noam Postavsky <npostavs <at> gmail.com>
Cc: van <at> scratch.space, Eli Zaretskii <eliz <at> gnu.org>, 31544 <at> debbugs.gnu.org,
 rms <at> gnu.org
Subject: Re: bug#31544: texinfo-mode fails to consistently fontify multiline
 @i{italic text}
Date: Sun, 23 Jan 2022 14:57:32 +0100

Noam Postavsky <npostavs <at> gmail.com> writes:

>> Thanks, this is unrelated to the manual.  It's some subtle problem with
>> JIT font-lock in that place.
>
> I think the problem is that texinfo-mode doesn't follow the advice in
> `(elisp) Multiline Font Lock'.

Hm...  I seem to be unable to reproduce the problem, but perhaps it is
intermittent?  Or has it been fixed in the years since it was reported?
(I don't see anything obvious in the texinfo-mode vc logs...)

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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