more typos

Co-authored-by: Nicholas Nethercote <[email protected]>

library/core/src/array/equality.rs

@@ -173,7 +173,7 @@ macro_rules! is_raw_eq_comparable {
     )+};
 }
 
-// SAFETY: All the ordinary integer types have no padding, and are no pointers.
+// SAFETY: All the ordinary integer types have no padding, and are not pointers.
 is_raw_eq_comparable!(u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize);
 
 // SAFETY: bool and char have *niches*, but no *padding* (and these are not pointer types), so this