fix of abstractshape

src/main/java/shape/AbstractShape.java

-package shape;
-
 import javafx.geometry.Point2D;
 import javafx.scene.canvas.GraphicsContext;
 import java.util.ArrayList;
@@ -25,6 +23,5 @@ public abstract class AbstractShape implements Shape {
     }
 
     @Override
-    public abstract void draw(GraphicsContext graphicsContext);
+    public abstract void draw(GraphicsContext graphics);
 }
-