Ruby

Remove the 65 size limit for name_err_mesg_to_str

This limit was introduced on Nov 20 1996
in 554b989ba1623b9f6a0b76f00824c83a23fbcbc1

Apparently to protect from a buffer overflow:

• eval.c (f_missing): オブジェクトの文字列表現が長すぎる時バッファ
  を書き潰していた

However I tested that path with very large strings
and it works fine.