title: Multi-Line Placeholder Text in Material UI
body: <p>I'm using the Material UI for a React App I'm developing. </p>
  
  <p>I'm using the <code>TextField</code> component and I need a multi-line placeholder for a textarea. I currently have:</p>
  
  <pre><code>       &lt;TextField
              id="details"
              fullWidth={true}
              multiline={true}
              rows={5}
              label="Give us some additional details:"
              placeholder="- Tell us about this project \n - What skills are you looking for ? &amp;#10; - What tools do you need an expert in? &amp;#10; - What is your timeline?"
          /&gt;
  </code></pre>
  
  <p>It needs to appear as: </p>
  
  <pre><code>- Tell us about this project 
  - What skills are you looking for ?
  - What tools do you need an expert in? 
  - What is your timeline?
  </code></pre>
  
  <p>You can see I've tried <code>&amp;#10;</code> as well as <code>\n</code> to no avail. any tips appreciated!</p>