Ruby

Wrong offset for opt positionals #1296

Job	Run time
ruby-versions / Generate Ruby versions	4s
build (truffleruby)	38s
build (3.3)	54s
build (head)	43s
build (4.0)	47s
build (3.4)	51s
build (truffleruby-head)	38s
	4m 35s

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