added doc and minor changes to have a better grid

src/main.rs

@@ -198,6 +198,7 @@ fn open_file(filename: &str) -> io::Result<String> {
     Ok(content)
 }
 
+///Here we display the grid by looping in every position checking if it exists in the HashMap.
 fn display_grid(
     w: &world::World,
     robot_pool: &Vec<robot::Robot>,
@@ -223,6 +224,7 @@ fn display_grid(
     for j in 0..w.x {
         print!("{}  ", j);
     }
+    println!();
 }
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // We handle CLI flags here.
@@ -244,7 +246,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let world: world::World = parse_config(raw_conf, &mut robot_pool)?;
     let mut hash: HashMap<robot::Position, u32> = HashMap::new();
     create_hash_map(&robot_pool, &mut hash);
-
+    display_grid(&world, &robot_pool, &hash);
     loop {
         let mut piouff: u32 = 0;
         for r in &mut robot_pool {