Fix(Ruby): Reorder operators to correctly tokenize <=>#3137
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Summary
Fixes #2791
Fixes operator tokenization in the Ruby lexer where
<=>was being incorrectly split into<+=>or<+=+>due to shorter patterns matching first. Fixed by reordering the regex alternations so that longer operators like<=>are matched before shorter overlapping ones (<,<=,>). Also, added=>as a recognized operator token which was previously missing.