pub fn u32_dec(buf: &mut [u8], v: u32) -> &strExpand description
Format v as decimal ASCII into buf, returning the digits as &str.
buf must be at least U32_DEC_MAX bytes for the general case.
32-bit only: the constant / 10 becomes a multu by its reciprocal and
the digit comes from v - q * 10, so no divide and no 64-bit helper runs.