title: Adding text to every second line and remove line break
body: <p>Using notepad++ I can't get it to work</p>
  <blockquote>
  <p>234234</p>
  <p>wqeqweqwe</p>
  <p>234234</p>
  <p>wqeqweqwe</p>
  <p>234234</p>
  <p>wqeqweqwe</p>
  </blockquote>
  <p>Should be like</p>
  <blockquote>
  <p>234234:wqeqweqwe</p>
  <p>234234:wqeqweqwe</p>
  <p>234234:wqeqweqwe</p>
  </blockquote>
  <p>but many more</p>