bug#69562: 29.2.50; go-ts-mode does not handle comments with fill-paragraph

[Ankit Gadiya via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

On Thu, 7 Mar 2024 at 15:08, Eli Zaretskii <eliz@gnu.org> wrote:

> I note that this bug and its discussion lack the minimal reproducible
> recipe, at least there's no complete recipe.  You start with showing
> some incomplete snippet, and AFAICT never show anything more detailed.
> So would you please post such a complete recipe, including:
>
>   . a Go source file to visit
>   . the sequence of Emacs command/keys to type in order to reproduce
>     the problem, after visiting the above file
>   . what you get in the buffer after these commands
>
> You see, I fear that you and Dmitry are not doing the same in your
> reproduction steps, and that is why Dmitry cannot reproduce the issue
> you are complaining about.  Having a complete self-contained recipe
> with all the details will go a long way towards eliminating the
> differences between what you see.  (It will also allow me to try
> reproducing this, as currently I have no idea what to type in the
> buffer under go-ts-mode to begin with.)
>
> Thanks.

In retrospect that makes sense, thank you. In fact I was able to figure
out the issue with reproduction, as I followed the advice of recording exact
command sequence.


Following is the full Go file to reproduce the issue:

```
package main

// This is the docstring for the main function that extends beyond
fill-column value.
func main() {
}
```

Following is the exact steps to reproduce the issue:

* emacs -Q main.go
* M-x go-ts-mode
* Highlight the full docstring line with Mouse.
* M-x fill-paragraph

This is the result in the buffer after executing the above steps:

```
package main

// This is the docstring for the main function that extends beyond
fill-column value.
func main() {
}
```

I think the difference between Dmitry and me was that I was highlighting the
docstring and Dmitry was not. I tried the same steps but without highlighting
just with the cursor somewhere in the docstring line and it worked as expected.
I believe this is what Dmitry observed as well. This is the content of my buffer
without highlighting the step.

```
package main

// This is the docstring for the main function that extends beyond
// fill-column value.
func main() {
}
```

(Please don't mind the repeated email, I forgot to CC the Bugtracker.)

On Thu, 7 Mar 2024 at 15:08, Eli Zaretskii <eliz@gnu.org> wrote:
>
> > Date: Thu, 7 Mar 2024 14:28:52 +0530
> > From:  Ankit Gadiya via "Bug reports for GNU Emacs,
> >  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> >
> > On Thu, 7 Mar 2024 at 07:27, Dmitry Gutov <dmitry@gutov.dev> wrote:
> > >
> > > Could you confirm that your problem reproduces if you start Emacs as
> > > 'emacs -Q'?
> >
> > I did notice some files from earlier versions of Emacs installation on my
> > machine. So just to rule it out, I cleared all the installations and re-compiled
> > and re-installed Emacs locally from the same commit again. Unfortunately, it is
> > still reproducing in the `emacs -Q` session.
> >
> > This is the output of `emacs-version` inside `emacs -Q` session.
> >
> > GNU Emacs 29.2.50 (build 6, x86_64-pc-linux-gnu, GTK+ Version 3.24.38,
> > cairo version 1.16.0) of 2024-03-04
> >
> > This is the partial output from the `report-emacs-bug` buffer in the same `emacs
> > -Q` session.
> >
> > In GNU Emacs 29.2.50 (build 6, x86_64-pc-linux-gnu, GTK+ Version
> > 3.24.38, cairo version 1.16.0) of 2024-03-04 built on t14
> > Repository revision: ae80192d97b8d0e54a9429091cd84190bdbeb49e
> > Repository branch: emacs-29
> > System Description: Debian GNU/Linux 12 (bookworm)
> >
> > I also tried fetching newer changes from the `emacs-29` branch and I'm
> > still able to reproduce it.
> >
> > GNU Emacs 29.2.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.38,
> > cairo version 1.16.0) of 2024-03-07
> >
> > In GNU Emacs 29.2.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
> >  3.24.38, cairo version 1.16.0) of 2024-03-07 built on t14
> > Repository revision: 6e801077ae88e72dbad32015a083602062c4efe3
> > Repository branch: emacs-29
> > System Description: Debian GNU/Linux 12 (bookworm)
>
> I note that this bug and its discussion lack the minimal reproducible
> recipe, at least there's no complete recipe.  You start with showing
> some incomplete snippet, and AFAICT never show anything more detailed.
> So would you please post such a complete recipe, including:
>
>   . a Go source file to visit
>   . the sequence of Emacs command/keys to type in order to reproduce
>     the problem, after visiting the above file
>   . what you get in the buffer after these commands
>
> You see, I fear that you and Dmitry are not doing the same in your
> reproduction steps, and that is why Dmitry cannot reproduce the issue
> you are complaining about.  Having a complete self-contained recipe
> with all the details will go a long way towards eliminating the
> differences between what you see.  (It will also allow me to try
> reproducing this, as currently I have no idea what to type in the
> buffer under go-ts-mode to begin with.)
>
> Thanks.