Configuration parser chokes on certain valid buildout configuration syntaxes

[dataflake]

Caution

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Describe the bug

The buildout configuration parser blows up on the buildout configuration syntax for prerequisite sections, specifically this line:

https://github.com/zopefoundation/Zope/blob/d99a18dfec8a809f32de7485ce3f7b8d03b00649/buildout.cfg#L80

To Reproduce

Steps to reproduce the behavior:

• Install plone.versioncheck into the Zope buildout configuration as documented here.
• Run bin/versioncheck -pn

Expected behavior

The script should run to completion and show output.

Screenshots

bin/versioncheck -pn
Parsing buildout files:
- /Users/jens/src/zope/Zope/buildout.cfg

Traceback (most recent call last):
  File "/Users/jens/src/zope/Zope/bin/versioncheck", line 21, in <module>
    sys.exit(plone.versioncheck.script.run())
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/Users/jens/src/.eggs/plone.versioncheck-1.8.2-py3.13.egg/plone/versioncheck/script.py", line 120, in run
    pkgsinfo["pkgs"] = parse(args.buildout)
                       ~~~~~^^^^^^^^^^^^^^^
  File "/Users/jens/src/.eggs/plone.versioncheck-1.8.2-py3.13.egg/plone/versioncheck/parser.py", line 158, in parse
    version_sections, annotations = _extract_versions_section(
                                    ~~~~~~~~~~~~~~~~~~~~~~~~~^
        session, buildout_filename, relative=base_relative
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/Users/jens/src/.eggs/plone.versioncheck-1.8.2-py3.13.egg/plone/versioncheck/parser.py", line 71, in _extract_versions_section
    config.read(filename)
    ~~~~~~~~~~~^^^^^^^^^^
  File "/Users/jens/src/python/Python-3.13.7/lib/python3.13/configparser.py", line 737, in read
    self._read(fp, filename)
    ~~~~~~~~~~^^^^^^^^^^^^^^
  File "/Users/jens/src/python/Python-3.13.7/lib/python3.13/configparser.py", line 1052, in _read
    ParsingError._raise_all(self._read_inner(fp, fpname))
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/jens/src/python/Python-3.13.7/lib/python3.13/configparser.py", line 334, in _raise_all
    raise next(exceptions).combine(exceptions)
configparser.ParsingError: Source contains parsing errors: '/Users/jens/src/zope/Zope/buildout.cfg'
	[line 82]: '=> make-docs\n'

Software (please complete the following information):

• Zope master branch
• plone.versioncheck 1.8.2

Additional context

As a workaround I pointed the script to the Zope versions.cfg file instead of buildout.cfg and that worked.