bug#61893: 29.0.60; Indentation in c-ts-mode broken again

[Eli Zaretskii]

> From: Yuan Fu <casouri@gmail.com>
> Date: Sat, 4 Mar 2023 15:03:46 -0800
> Cc: Eli Zaretskii <eliz@gnu.org>,
>  Daniel Martín <mardani29@yahoo.es>,
>  61893@debbugs.gnu.org
> 
> >>>> The elif directive’s and subsequent directives aren’t indented properly. 
> >>>> Looking at the parsed tree, the elif directives are nested in the if 
> >>>> directive, and the nesting can be arbitrarily deep. We probably need a 
> >>>> custom function rather than great-grand-parent to find the anchor, like 
> >>>> a function that keeps going up the tree until the node isn’t a preproc 
> >>>> directive anymore.
> >>>> 
> >>>> Yuan
> >>> 
> >>> Yeah, you're right. I'll see what I can do, but bandwidth is a little low 
> >>> at the moment, so if you have some extra time, don't hesitate to improve 
> >>> it :)
> >> 
> >> Absolutely, I’ll work on it. 
> >> 
> >> Yuan
> > 
> > Thanks :)
> 
> Done!

Thanks.

Some problems still remain.

Line 1761 of dispnew.c: type "C-e RET" -- point goes to column 7
instead of the expected column 2.

Line 3381 of dispnew.c: type "C-e RET" -- point goes to the correct
column, but line 3381 is reindented incorrectly.

Line 6611 of dispnew.e: type "C-e RET" -- point goes to column 0
instead of the expected column 2.  If you type "C-e RET" on the next
line 6612, point goes to column 0 and the line is reindented
incorrectly.

Line 13925 of xdisp.c: type "C-e RET" -- point goes to column 33(!)
and line 13925 is reindented incorrectly.

Lines 34529 and 34530 of xdisp.c: "C-e RET" produces incorrect column
of point and reindents line 34530.