title: Remove trailing delimiting character from a delimited string
body: <p>What is fastest way to remove the last character from a string?</p>
  
  <p>I have a string like</p>
  
  <pre><code>a,b,c,d,e,
  </code></pre>
  
  <p>I would like to remove the last ',' and get the remaining string back:</p>
  
  <pre><code>OUTPUT: a,b,c,d,e
  </code></pre>
  
  <p>What is the fastest way to do this?</p>