Double now is explained as: 5+ D; 2+ S; 17- HCP; forcing to 3N
This is ridiculous. First of all, why need it show 2+ spades if it's forcing to 3N? Or is "forcing to 3N" secret GIB language for "penalty double"?
Secondly, this double should actually show 4 hearts, and nothing else.
(Incidentally, 1NT is explained with "likely stop in C". If anything, it should show a spade stopper more than a club stopper.)

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