Fixes Empty markdown file generation and formatting due to colon use in argument block

[ltan10]

What kind of change does this PR introduce?

• Bugfix
• New Feature
• Feature Improvment
• Refactoring
• Documentation
• Other, please describe:

Description:

• Fixes generation of empty markdown files.
  • Caused by previous PR Update legacy module load #57, forgetting to call on mod_spec.loader.exec_module(mod)
  • Inherently also fixed issue Python 3.12 AttributeError("'FileFinder' object has no attribute 'find_module'") #69
• Fixes incorrect formatting due to the use of colon ":" in argument blocks.
  • Line was not appending to parent argument, but appended on own line

Checklist:

• My changes don't require a change to the documentation, or if they do, I've added all required information.