LDoc2tl/tests/styles/opt.md

By default, an unbroken series of opt modifiers is converted to 'opt','optchain','optchain', so you get (a[,b[,c]).

If convert_opt is specified, then no such conversion takes place; you then must explicitly use optchain.

The @include tag is only meaningful for project-level items like modules, scripts, etc. The file is inserted into the document after being formatted. In this case, you would usually specify format="markdown".