Error when parsing markdown headers with code element

[rlalik]

When parsing md file with header starting with code element, like (github parses the code markers automatically)
#### coverage
then it fails with error quoted below. There is no problem if there is some extra text in the beginning:
#### Target coverage

Apparently, i.text element in doxygen.py#711 is None in that case. In the generated documentation, when using "Traget coverage" form, I see only "Target" as a hedaer title. Not sure whether this is Doxygen issue or m.css issue.

  File "/home/rafal/cbm/software/src/sts/geri-smx-decoder/build/release/mcss/documentation/doxygen.py", line 4317, in <module>
    run(state, templates=os.path.abspath(args.templates), wildcard=args.wildcard, index_pages=args.index_pages, search_merge_subtrees=not args.search_no_subtree_merging, search_add_lookahead_barriers=not args.search_no_lookahead_barriers, search_merge_prefixes=not args.search_no_prefix_merging)
    ~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rafal/cbm/software/src/sts/geri-smx-decoder/build/release/mcss/documentation/doxygen.py", line 4168, in run
    parsed = parse_xml(state, file)
  File "/home/rafal/cbm/software/src/sts/geri-smx-decoder/build/release/mcss/documentation/doxygen.py", line 2839, in parse_xml
    compound.description, templates, compound.sections, footer_navigation, example_navigation, search_keywords, compound.deprecated, compound.since = parse_toplevel_desc(state, compounddef.find('detaileddescription'))
                                                                                                                                                      ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rafal/cbm/software/src/sts/geri-smx-decoder/build/release/mcss/documentation/doxygen.py", line 1917, in parse_toplevel_desc
    parsed = parse_desc_internal(state, element)
  File "/home/rafal/cbm/software/src/sts/geri-smx-decoder/build/release/mcss/documentation/doxygen.py", line 649, in parse_desc_internal
    parsed = parse_desc_internal(state, i)
  File "/home/rafal/cbm/software/src/sts/geri-smx-decoder/build/release/mcss/documentation/doxygen.py", line 649, in parse_desc_internal
    parsed = parse_desc_internal(state, i)
  File "/home/rafal/cbm/software/src/sts/geri-smx-decoder/build/release/mcss/documentation/doxygen.py", line 649, in parse_desc_internal
    parsed = parse_desc_internal(state, i)
  File "/home/rafal/cbm/software/src/sts/geri-smx-decoder/build/release/mcss/documentation/doxygen.py", line 711, in parse_desc_internal
    title = html.escape(i.text)
  File "/usr/lib/python3.14/html/__init__.py", line 19, in escape
    s = s.replace("&", "&amp;") # Must be done first!