bug#57223: 29.0.50; python-nav-forward-block moves backward under certain conditions.

[kobarity]

Hi,

The following steps move the point backward to the beginning of the line.

1. emacs -Q
2. Load the following Python file using M-x find-file

#+begin_src python
if True:
    pass
#+end_src

3. M-x forward-char
4. M-x python-nav-forward-block

This happens when:

- point is on the block-start line of the last block,
- point is at least one character after the beginning of block-start, and
- searching forward (positive ARG for python-nav-forward-block).

Attached is a patch to fix this issue.

Best Regards,

--

In GNU Emacs 29.0.50 (build 10, x86_64-pc-linux-gnu)
 of 2022-08-15 built on ubuntu
System Description: Ubuntu 22.04.1 LTS

Configured using:
 'configure --without-x --with-gnutls=ifavailable'

Configured features:
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XIM ZLIB

Important settings:
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Major mode: Python

Minor modes in effect:
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Load-path shadows:
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Memory information:
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fix-python-nav-forward-block.patch
Description: Binary data