add a comment and delete space useless

app/src/main/java/school_project/MapGenerator.java

@@ -48,6 +48,7 @@ public class MapGenerator {
                 map_shape[i][j] = rand.nextBoolean();
             }
         }
+        //delete lonely piece
         for (int i =0;i<map_shape.length;i++){
             for (int j = 0; j<map_shape[i].length;j++){
                 boolean test = false;
@@ -62,7 +63,6 @@ public class MapGenerator {
                     }
                     if (!test)
                         map_shape[i][j] = false;
-
                 }
             }
         }