add comment to clone method

Tool/src/Lawnmower.cs

@@ -58,6 +58,10 @@ public class Lawnmower : ElectricTool
     _fuelLevel = _fuelCapacity;
   }
 
+  /// <summary>
+  /// Клонирует газонокосилку
+  /// </summary>
+  /// <returns>Клоннированная газонокосилка</returns>
   public override object Clone()
   {
     var lawnmower = new Lawnmower(Name, Material, Weight, Power, FuelCapacity)