Error if a file is empty

[sebix]

If one of the source files is empty, this exception occurs:

Traceback (most recent call last):
  File "/usr/lib64/python3.13/site-packages/mkdocs/livereload/__init__.py", line 211, in _build_loop
    self.builder()
    ~~~~~~~~~~~~^^
  File "/usr/lib64/python3.13/site-packages/mkdocs/commands/serve.py", line 67, in builder
    build(config, serve_url=None if is_clean else serve_url, dirty=is_dirty)
    ~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.13/site-packages/mkdocs/commands/build.py", line 347, in build
    config.plugins.on_post_build(config=config)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.13/site-packages/mkdocs/plugins.py", line 602, in on_post_build
    return self.run_event('post_build', config=config)
           ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.13/site-packages/mkdocs/plugins.py", line 568, in run_event
    result = method(**kwargs)
  File "/usr/lib64/python3.13/site-packages/mkdocs_pandoc/plugin.py", line 130, in on_post_build
    self.renderer.write_combined_pandoc(abs_pandoc_path)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.13/site-packages/mkdocs_pandoc/renderer.py", line 97, in write_combined_pandoc
    if not lines[-1].endswith("\n"):
           ~~~~~^^^^
IndexError: list index out of range