title: How to ignore lines starting with a string with diff?
body: <p>How can I diff two files and ignore lines starting with a sequence.</p>
  
  <p>E.g </p>
  
  <pre><code>File1:
  abc
  def
  time:123
  
  File2:
  igh
  def
  time:345
  </code></pre>
  
  <p>With unix diff it will report </p>
  
  <pre><code>&lt;time:123
  &gt;time:345
  </code></pre>
  
  <p>I want to ignore this diff. Any ideas?</p>