bug#61463: 29.0.60; python-shell-send-region moves point

[Eli Zaretskii]

> Cc: 61463@debbugs.gnu.org
> Date: Tue, 14 Feb 2023 00:43:39 +0900
> From: kobarity <kobarity@gmail.com>
> 
> Augusto Stoffel wrote:
> > On Emacs -Q:
> > 
> > 1) M-x run-python
> > 2) In the scratch buffer, type something, say 1 + 2 and mark it, leaving
> >    point at the end.
> > 3) M-x python-shell-send-string
> 
> Probably a typo of python-shell-send-region.
> 
> > Now the point is at the beginning of the region.  It was supposed not to
> > move.
> > 
> > I suspect this might be due to a missing `save-excursion' in the
> > definition of the local variable `single-p' in python.el.
> 
> Thank you for pointing that out.  You are right, `single-p' needs
> `save-excursion'.  The same bug exists in `starts-at-first-line-p'.
> I'm sorry for those bugs.
> 
> Atatched is a fix for this problem with improved ERTs to detect this
> issue.

Thanks, installed on the emacs-29 branch, and closing the bug.