This was the last thing that was missing for complete support of all
function parameter declarations.
To ensure parameter lists stay valid a unit test was added that will
validate the argument lists and cause the test to fail if they cannot be
parsed.
I added a pretty generic container structure for the scripting
documentation when adding JSON output. However, I did not use that new
structure for the HTML output since that was just too much work.
This moves the HTML output over to the new structure so now the
scripting API handling code is independent from how the resulting
documentation is generated. I also moved that code out of the main
scripting code which removes quite a lot of clutter in those files.
This is mostly a straight port of the old code with no significant
changes (except the changes to make it use the new data).