title: max-width not working on anchor within fieldset
body: <p>I'm trying to build a page, whose contents always shall be within the visible width. This worked fine, until I added a fieldset.</p>
  
  <p>For some reason, the anchor text will not break, when the anchor rests in a fieldset. Can anyone tell me<br/>
  - why?<br/>
  - how to circumvent this?</p>
  
  <p>Example:</p>
  
  <pre><code>&lt;fieldset&gt;
    &lt;a href="example.com"&gt;verylonglinktextthatmakesproblemsinsmallwindows&lt;/a&gt;
  &lt;/fieldset&gt;
  &lt;a href="example.com"&gt;verylonglinktextthatbreaksmagicallyoutsidethefieldset&lt;/a&gt;
  </code></pre>
  
  <p>Here is a fiddle:
  <a href="https://jsfiddle.net/myngsges/2/" rel="nofollow noreferrer">https://jsfiddle.net/myngsges/2/</a></p>