Upon invocation, the executable idoc needs to receive the
name of a Haskell source module on the command line. The tool reads the
Haskell source and produces an interface documentation document in the
selected markup language (currently, this is always HTML).
Usage: idoc [ option... ] haskell-file -h, -? --help brief help (the present message) -m LANG --markup-language=LANG generate output in markup language LANG -o FILE --output=FILE write resulting interface description to FILE -v --version show version information Currently supported markup languages: HTML.