fix output indent

main.py

@@ -96,7 +96,7 @@ if __name__ == '__main__':
                 print("  sub-cluster %d:" % l)
                 print("  size =", np.sum(mask))
                 print("  center = %f, %f" % (center[0], center[1]))
-                print("radius = %f m" % rad)
+                print("  radius = %f m" % rad)
                 print("  avg yaw =",
                         np.average(np.fmod(yaw[mask], 2*pi)) / pi * 180)