title: How to merge two items from a List into only one?
body: <p>Supposing I have the following list:</p>
  
  <p><code>A | B | C | D</code> or <code>the | temperature | is | 100 | °F | today</code></p>
  
  <p>I want to merge two attributes into one, something like this:</p>
  
  <p><code>A | BC | D</code> or <code>the | temperature | is | 100°F | today</code></p>
  
  <p>How can I achieve this? The Collection can be changed, if needed.</p>