title: addArc(withCenter) closing path
body: <p>The following code:</p>
  
  <pre><code>  let size = CGSize(width: 200, height: 30)
    let rect = CGRect(origin: .zero, size: size)
  
    let path1 = UIBezierPath()
    path1.move(to: CGPoint(x: 10, y: 5))
    path1.addLine(to: CGPoint(x: 180, y: 5))
    path1.addArc(withCenter: CGPoint(x: 180, y: 20), radius: 15, 
      startAngle: (3.14159 / 2), endAngle: (3 * 3.14159 / 2), clockwise: false)
  </code></pre>
  
  <p>produces this:</p>
  
  <p><a href="https://i.stack.imgur.com/cTcXt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cTcXt.png" alt="enter image description here"></a></p>
  
  <p>Ok, am I missing something? I do not want to close this path. I never call <code>path1.close()</code>. I want to add another straight line from the end of the arc, not from the closed version of it. Basically, I don't want the half circle to be closed, how can I do that? </p>