🐛 Fix SequenceSet#include?
handling of invalid inputs
#479
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The rdoc said it returned
false
, but it actually crashed. It's sometimes useful to make the distinction between invalid input and valid input with a false return value, so I've updated so invalid input returnsnil
(and updated the rdoc to match).Also, some of the rdoc examples were simply wrong. Maybe a copy/paste error from
#intersect?