Struct with cleaner inspect and pretty print

s.rb

class S < Struct
  def inspect
    pretty_inspect # may be not defined yet, don't alias
  end

  def pretty_print(q)
    q.group(1, sprintf("<%s", PP.mcall(self, Kernel, :class).name.split('::').last), '>') {
      q.seplist(PP.mcall(self, Struct, :members), lambda { q.text "," }) {|member|
        q.breakable
        q.text member.to_s
        q.text '='
        q.group(1) {
          q.breakable ''
          q.pp self[member]
        }
      }
    }
  end

  def pretty_print_cycle(q)
    q.text sprintf("<%s:...>", PP.mcall(self, Kernel, :class).name.split('::').last)
  end
end