dchest on Never create Ruby strings longer than 23 characters

Comment on Never create Ruby strings longer than 23 characters parent

It seems like the length is stored inside RString's RBasic->flags:

  #define RSTRING_EMBED_LEN(str) \
     (long)((RBASIC(str)->flags >> RSTRING_EMBED_LEN_SHIFT) & \
            (RSTRING_EMBED_LEN_MASK >> RSTRING_EMBED_LEN_SHIFT))

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