--- pp(obj)
#    adds obj to the pretty printing buffer
#    using Object#pretty_print or Object#pretty_print_cycle.
    Object#pretty_print  Object#pretty_print_cycle Ȥäơ
    obj  pretty print Хåեɲäޤ

#    Object#pretty_print_cycle is used when obj is already
#    printed, a.k.a the object reference chain has a cycle.
    obj Ǥ˽ϤƤȤˤ Object#pretty_print_cycle 
    Ȥޤϥ֥ȤλȤϢ롼פƤ뤳Ȥ
    ̣ޤ

