ri(1) on macOS
The text 75466e92f5a3, as OS X 10.9.2, OS X 10.9.1, OS X 10.9 shipped it.
Ruby API reference front end
Flags it lists
-
--doc-dir -
--fmt -
--format -
--interactive -
--list-doc-dirs -
--no-pager -
--no-standard-docs -
--version -
--width -
-T -
-d -
-f -
-i -
-w