title: regexpression for Searching multiline HTML or Xml comments which i can use in bat file
body: <h2>input file</h2>
  
  <pre><code>&lt; !--You are a good boy --&gt;    
  This is my second line    
  &lt;! --I am a good boy
  He is hero--&gt;
  This is a fine
  &lt; !--This line contains xml tags
  This can be a html line or xml line    
  --&gt;
  Done
  </code></pre>
  
  <p>After applying regexp logic in batch file output should be</p>
  
  <h2>output</h2>
  
  <pre><code>This is my second line
  This is a fine
  Done
  </code></pre>
  
  <p>Note
  ---- <code>&lt; !--</code> starting of a html or xml comment <code>--&gt;</code> stands for ending of a html or xml comment</p>