Is there a better way to write this? `x: u8`

-- rustfmt wants to put each equality check on it's own line, which makes the function take up half the screen:

```
x == b'@'
|| x == b'$'
|| x == b'%'
|| x == b'^'
|| x == b'$'
|| x == b'_'
|| x == b':'
|| x == b'.'
// compaarison
|| x == b'='
|| x == b'<'
|| x == b'>'
|| x == b'&'
|| x == b'!'
// arith
|| x == b'+'
|| x == b'-'
|| x == b'*'
|| x == b'/'
```