improve board visuals

game/entity.rs

@@ -12,7 +12,7 @@ pub enum Cell {
 
 impl std::fmt::Display for Cell {
     fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        let mut s: &str = "";
+        let s: &str;
         match *self {
             Cell::CellX => s = "X",
             Cell::CellO => s = "O",
@@ -118,7 +118,7 @@ impl std::fmt::Display for Board {
 
         s.push_str("    1   2   3 \n");
 
-        s.push_str("  ┌─┬─┬─┐\n");
+        s.push_str("  ┌───┬───┬───┐\n");
         for i in 0..3 {
             match i {
                 0 => s.push_str("a "),
@@ -127,16 +127,16 @@ impl std::fmt::Display for Board {
                 _ => {}
             }
             s.push_str(&format!(
-                "│{}│{}│{}│\n",
+                "│ {} │ {} │ {} │\n",
                 self.cells[i * 3],
                 self.cells[i * 3 + 1],
                 self.cells[i * 3 + 2]
             ));
             if i < 2 {
-                s.push_str("  ├─┼─┼─┤\n");
+                s.push_str("  ├───┼───┼───┤\n");
             }
         }
-        s.push_str("  └─┴─┴─┘\n");
+        s.push_str("  └───┴───┴───┘\n");
 
         match self.has_winner() {
             Some(w) => s.push_str(&format!("The winner is {w}")),