title: angular 2 material matTooltip multiline
body: <p>I'm new to Angular 2 Material. What's the preferred way to make a tool tip multi-line?</p>
  
  <p>For example, I might have the following tool tip:</p>
  
  <pre><code>AA BBBBBBBBBB CCCC DDDDD
  </code></pre>
  
  <p>And, I may want to to have it display in a multi-line format like this:</p>
  
  <pre><code>AA BBBBBBBBBB 
  CCCC 
  DDDDD
  </code></pre>