bug#56600: 29.0.50; Python navigation problem with an empty line in nested defun

[kobarity]

Hi,

The following steps will place the point at the beginning of the line
"def foo():", not the line "def bar():".

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

#+begin_src python
def foo():
    def bar():

        pass

    def baz():
        pass
#+end_src

3. M-: (forward-line 2)
4. M-: (python-nav-beginning-of-defun)

python-nav-end-of-defun has a similar problem.

Best Regards,

--

In GNU Emacs 29.0.50 (build 6, x86_64-pc-linux-gnu)
 of 2022-07-16 built on ubuntu
Repository revision: ea9b442b82f1efd7e41094b455a00d73c16d0fc3
Repository branch: master
System Description: Ubuntu 22.04 LTS

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

Configured features:
ACL LIBXML2 MODULES NOTIFY INOTIFY PDUMPER SECCOMP SOUND SQLITE3 THREADS
XIM ZLIB

Important settings:
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  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

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Load-path shadows:
None found.

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Memory information:
((conses 16 44274 5286)
 (symbols 48 5634 1)
 (strings 32 15464 1865)
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