Alternative Way To Break Up Large Code Blocks Suggested By @saivann

* Place medium-sized code blocks at the top of the three h6 subsections
  with basic (but useful) comments.

* Place lines of code before their descriptions, removing the need for
  manual line breaks. Suggested by @saivann and it looks nice. (Thanks!)

* Prefixed each description with the variable name being described to
  match the format used in Payment and PaymentACK. Also suggested by
  @saivann to good effect. (Thanks!)