[BUG] Radix Integer Formatter Incorrectly Uses Uninitialized Memory

[Alexhuszagh]

Description

When using MaybeUninit::uninit, the radix writer converts this then to a &mut [u8], which is fine as long as the memory is read, however, all assignments are done via read/writes and not pointer writes. Since these formatters require copying to a temporary buffer anyway, it's very unlikely the use of a zero-initialized vs. a maybe unitialized buffer will cause major performance enhancements.

rust-lexical/lexical-write-integer/src/radix.rs

Line 65 in 6851835

let mut digits: mem::MaybeUninit<[u8; 64]> = mem::MaybeUninit::uninit();

rust-lexical/lexical-write-integer/src/algorithm.rs

Line 32 in 6851835

unsafe { index_unchecked_mut!($bytes[$index] = $table[$r + 1]) };

[Alexhuszagh]

Related to #95.