Nobuyoshi Nakada 99249cc582 [ruby/json] Fix non-portable code
A plain `char` may be `signed` or `unsigned` depending on the
implementation.  Also, bitwise ORing of `signed` values ​​is not
guaranteed to be `signed`.  To ensure portability, should logical-OR
each comparison, but casting to `signed char` is usually sufficient.

https://github.com/ruby/json/commit/8ad744c532
2025-12-31 12:44:18 +00:00
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