public class Circle implements Shape {
    private double radius;

    public Circle() {
        this(1.0);
    }
    public Circle(double radius) {
        this.radius = radius;
    }
	public double getPerimeter() {
        return getCircumference();
    }
	public double getCircumference() {
        return 2 * Math.PI * radius;
    }
}

@@ -170,33 +170,36 @@
 = radius;%0A    %7D%0A
-%09
+    
 public double ge
@@ -258,9 +258,12 @@
   %7D%0A
-%09
+    
 publ

fix indentation