title: Validation problem with XML declaration
body: <p>I'm a complete beginner, and having real problems getting my XML declaration to validate to 1.0 strict.  Can anyone help?</p>
  
  <p>I've been told to put  but when I run it through the W3 validator, it adds some stuff, so it looks like this:</p>
  
  <pre><code>&lt;?xml version="1.0! encoding="UTF-8"?&gt;&lt;!-- &lt;?xml version="1.0! encoding="iso-8859-1"?&gt; --&gt;
  </code></pre>
  
  <p>and says I have 3 errors:</p>
  
  <p>String not closed expecting " or ' 
  Blank needed here
  parsing XML declaration: '?>' expected </p>
  
  <p>all in the same place, at the first 0 in </p>
  
  <pre><code>&lt;?xml version="1.0! encoding="UTF-8"?&gt;&lt;!-- &lt;?xml version="1.0! encoding="iso-88…
  </code></pre>
  
  <p>Apologies if this is a really stupid question, but this is my first time writing for the web!</p>
  
  <p>Many thanks! </p>