--- Iconv#close
    Ѵλޤ

    Υ᥽åɤƤФ줿Ȥ Iconv#iconv ƤФ㳰
    ޤclose ΤϷ֤ƤФƤޤ

    ͤȤơ
    ϥХåեեȾ֤᤹ΥХޤʸ֤ޤ

       i = Iconv.open("ISO-2022-JP", "EUC-JP")
       i.iconv("\264\301")     #=> "\e$B4A"
       i.iconv("\273\372")     #=> ";z"
       i.close                 #=> "\e(B"

