title: Need regex for all HTML <input /> tags which lack a specific attribute
body: <p>I need a regex to match all self-closing <code>&lt;input /&gt;</code> tags which lacks a <strong>type</strong> attribute.</p>
  
  <p>For example, I want to find these:</p>
  
  <pre><code>&lt;input size="1" /&gt;
  &lt;input name="test" /&gt;
  </code></pre>
  
  <p>But not this:</p>
  
  <pre><code>&lt;input type="radio" /&gt;
  </code></pre>
  
  <p>Please note, this should be adaptable for any single attribute. I am just using type here as an example.</p>
  
  <p>FYI, I am performing a search across 1000s of .html files using AstroGrep.</p>
  
  <p>You can assume that the attribute is well-formed, with equals sign and double quotes.</p>