bug#58873: 29.0.50; Fix indent-line-function in tree-sitter

[Yuan Fu]

> On Oct 29, 2022, at 12:11 PM, Theodor Thornhill via Bug reports for GNU 
> Emacs, the Swiss army knife of text editors <bug-gnu-emacs@gnu.org> wrote:
> 
> 
> Hi Yuan!
> 
> There were some regressions with the new indent-line-function - see
> attached patch.  We need the point, not the indentation, and the
> save-excursion is actually needed.
> 
> consider:
> 
> ```
> foo({
>  thing: 1,
>                tho|ng: 2, // <--- point is |
> })
> ```
> 
> if you indent now you want to end up like this:
> 
> ```
> foo({
>  thing: 1,
>  tho|ng: 2, // <--- point is |
> })
> ```
> 
> or if 
> 
> ```
> foo({
>  thing: 1,
> |thong: 2, // <--- point is |
> })
> ```
> You want to end up like this:
> 
> ```
> foo({
>  thing: 1,
>  |thong: 2, // <--- point is |
> })
> ```
> 
> This patch addresses this :-)
> 
> In addition there was a bug where the parent-bol didn't indent
> correctly, this should also be fixed now.
> 
> Thanks again, Yuan!

I applied your change (manually), thanks!

Yuan