module Utils::IRB::Shell

def ri(*patterns)

pattern.class.name as argument.
Start _ri_ for +pattern+. If +pattern+ is not string like, call it with

def ri(*patterns)
  patterns.map! { |p| p.respond_to?(:to_str) ? p.to_str : p.class.name }
  system "ri #{patterns.map { |p| "'#{p}'" } * ' '} | #{$pager}"
end