remove ambiguous Unicode characters

src/main.rs

@@ -114,7 +114,7 @@ fn unpack8(x: u64, out: &mut [u8; 9]) {
     out[8] = 0;
 }
 
-/// Print the 64×31, 64×32, 64×33 representation matrices
+/// Print the 64x31, 64x32, 64x33 representation matrices
 fn print_representation() {
     let mut la = [0u64; 64];
     let mut lb = [0u64; 64];
@@ -245,7 +245,7 @@ const TAC: [u64; 24] = [
     0xb38000003c800000,
 ];
 
-/// Full meet-in-the-middle attack (7‑bit u, 10‑bit w)
+/// Full meet-in-the-middle attack (7-bit u, 10-bit w)
 fn attack(z: u64) -> u64 {
     const LOG_U: u32 = 7; // size of u space (bits)
     const LOG_W: u32 = 10; // size of w space (bits)