Format using rustfmt

src/main.rs

@@ -26,10 +26,10 @@ fn main() {
                 _ => {}
             }
         }
-	let neighbors: Vec<usize> = neighbors.iter().map(|node| node.index()).collect();
+        let neighbors: Vec<usize> = neighbors.iter().map(|node| node.index()).collect();
-	for neighbor in neighbors {
+        for neighbor in neighbors {
-	    print!("{} ", neighbor);
+            print!("{} ", neighbor);
-	}
+        }
         println!("");
     }
 }