streamline this

src/room.rs

@@ -99,12 +99,9 @@ impl From<String> for Room {
         let mut tiles: Vec<String> = Vec::new();
 
         for line in lines.into_iter() {
-            let line: Vec<&str> = if line.contains(",") {
-                line.split(",").collect()
-            } else {
-                // old room format
-                line.split("").collect()
-            };
+            let line: Vec<&str> = line
+                .split(if line.contains(",") {","} else {""}) // old room format?
+                .collect();
 
             for tile_id in line {
                 tiles.push(tile_id.to_string());