irb1.9.1(1) on Linux
The text 68fdb6d909f3, as Debian 7 (Wheezy) shipped it. The page shows this text now.
interactive ruby
Flags it lists
-
--back-trace-limit -
--inf-ruby-mode -
--inspect -
--irb_debug -
--noinspect -
--noprompt -
--noreadline -
--prompt -
--prompt-mode -
--readline -
--simple-prompt -
--tracer -
--version -
-d -
-f -
-m -
-r -
-v