def help(cmd)
%{
irb [-d]\tstarts an Interactive Ruby (IRB) session.
If -d is added you can get access to debugger state via the global variable
$rdebug_state.
irb is extended with methods "cont", "n", "step" and "q" which run the
corresponding debugger commands. In contrast to the real debugger
commands these commands do not allow command arguments.
However to run any arbitrary rdebug command which does not involve
execution of the debugged program (like the above "step" "cont", etc.)
use method "dbgr" and give an array of string parameters. For example:
dbgr ['list', '10'] # same as "list 10" inside debugger
}
end