c3b4c91 More consistent section headings

Authored and Committed by tibbs 2 years ago
    More consistent section headings
    
    I tried to apply more consistent capitalization for section headings,
    and use source code formatting where appropriate in those headings.
    
    I have left some headings alone because they were seemingly intended to
    be complete sentences, which is pretty bad but not something I want to
    change in a "small fixes" series.