yui-knk db476cc71c Introduce NODE_SYM to manage symbol literal
`:sym` was managed by `NODE_LIT` with `Symbol` object.
This commit introduces `NODE_SYM` so that

1. Symbol literal is detectable from AST Node
2. Reduce dependency on ruby object
2024-01-09 16:07:19 +09:00
..
2023-12-16 10:09:50 +08:00
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