Constant lexical_util::format::RUBY_LITERAL

pub const RUBY_LITERAL: u128 = NumberFormatBuilder::new()
    .digit_separator(num::NonZeroU8::new(b'_'))
    .required_digits(true)
    .no_special(true)
    .no_integer_leading_zeros(true)
    .no_float_leading_zeros(true)
    .internal_digit_separator(true)
    .build(); // 202_824_096_038_269_144_926_504_985_048_079u128

Number format for a Ruby literal floating-point number.