without having to export an environment variable.
They were never really supported, anyway. The files are still created for folks to copy around.
There are way too many `h3` headers. Some functions have many different signaures. Instead, have one header for each function name, and then list the parameters as a definition list after the synopsis. This keeps the signatures explicit while minimizing the number (and length!) of the `h3` headers. To make this work, the documentation must be Multimarkdown, as Markdown does not support definition lists.
Move TOC generation and cleanup to an external script that's easier to maintain.