This is a kind of ‘flag’ module. If you want to write your own ‘ri’ display module (perhaps because you’r writing an IDE or somesuch beast), you simply write a class which implements the various ‘display’ methods in ‘DefaultDisplay’, and include the ‘RiDisplay’ module in that class.
To access your class from the command line, you can do
ruby -r <your source file> ../ri ....
If folks really want to do this from the command line, I’ll build an option in