class Byebug::IRBCommand

def description
  %{
    irb[ -d]\tstarts an Interactive Ruby (IRB) session.
    If -d is added you can get access to byebug's state via the global
    variable $byebug_state. IRB is extended with methods "cont", "n" and
    "step" which run the corresponding byebug commands. In contrast to the
    real byebug commands these commands don't allow arguments.
  }
end