bug#14343: cperl-mode: Inserting text into here-documents now works

[haj@posteo.de (Harald Jörg)]

Hello,

> On 2021-08-31 07:04:31 +0000, Harald Jörg wrote:
>> The bug which made CPerl mode mistreat changes to here-documents has
>> been fixed in the repository, for the cases of (insert "\n") (Bug#28962)
>> and yanking (Bug#14343) in particular, and in general for changes by
>> elisp code.
>> 
>> cperl-mode.el from the repository can be used with Emacs 26.1 or newer.
>
> Concerning my bug #14343, I had noted 4 years ago in the associated
> Debian bug that I could no longer reproduce the issue in Emacs 25:
>
>   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=706701#17

Thanks for that info!  I admit that I haven't checked the fate of the
Debian bug report when I started testing, but I can confirm that with
your particular recipe, the bug does not appear.

> So it seems that there had already been some fixes in the past...

The bug was still open in the Emacs bugtracker, so I did some tests and
found that when I yank a region from regions _outside_ of a here-doc
text, then fontification still wasn't correct (without that fix).  For a
colorful example, triple-click the line "print <<EOF;" and paste
with the middle mouse button.

So, the fix in Emacs 25 was only partial.  As of now, whatever you paste
into the here-document, should be fontified correctly, so eventually
I've closed the bug in the Emacs bugtracker.
-- 
Cheers, and thanks for reporting back,
haj