This causes Idris to not emit messages about "Type checking ...." while
in quiet mode, which improves the portability of tests to Windows (due
to the slash facing the other way there). It also makes tests a bit more
robust with regards to their source files changing names.
The syntax is the same as for other documentation, right before the
"module" declaration. For an example, see the "idrisdoc009" test. Terms
in module documentation are elaborated in a context including all of its
imports and definitions, so the documentation can provide examples and
descriptions.
The :doc command now also shows documentation for modules.
