Ensures role="text" is used on elements with no focusable descendants
How to Fix the Problem
Correct markup solutions
    The role="text" attribute should be put on an element with no
    focusable descendants.
  
<h1><span role="text">Hello <br/>World</span></h1>Incorrect markup solutions
<span role="text">
  <a href="/site.html">Not announced as link</a>
</span>
Why it Matters
  When a text node is split by markup (e.g.
  <h1>Hello <span>World</span></h1>)
  VoiceOver will treat it as two separate phrases instead of just one. Adding
  role="text" around the elements solves the problem. However, it
  also overrides the role of the element and all descendants and treats them all
  as text nodes. If one of the descendant elements is also focusable it would
  create an empty tab stop. That is, you could tab to the element but VoiceOver
  would not announce its name, role, or value.
Rule Description
  Elements with role="text" must not have focusable descendants.
The Algorithm (in simple terms)
  Checks all elements with role="text" to ensure that they do not
  have focusable descendants.
 
              
