Constant thousands::digits::ASCII_HEX

pub const ASCII_HEX: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e',
  'f', 'A', 'B', 'C', 'D', 'E', 'F']

The hexadecimal digits, in ASCII.