csail/6006psets_ng — comment on commit 837c03ca86177f4d55790c7444d0b32e98b2b026
File: 5/code/rsa/ks_primitives_unchecked.rb line 12
By pwnall:

Consider making hex_digits a constant frozen string, and referring to it here.

`HEX_DIGITS = '0123456789ABCDEF'.freeze`