title: What does ''-' mean in ^[A-Z]+[a-zA-Z''-'\s]*$?
body: <p>I found a regex <code>^[A-Z]+[a-zA-Z''-'\s]*$</code> from <a href="https://docs.microsoft.com/en-us/aspnet/core/tutorials/razor-pages/validation" rel="nofollow noreferrer">this tutorial</a> and does not understand the meaning of <code>''-'</code>. What does it mean?</p>
  
  <h1>Edit</h1>
  
  <p>After reading the comments given to this question and the corresponding answer or deleted answer, now I know that this question must be deleted because this problem is about typo presented in the tutorial.</p>