title: Remove all characters before "-" on each line of multiline textarea text
body: <p>I am getting some text from a multiline textarea, each line is separated by a line break:</p>
  
  <pre><code> 1 - test1
   2 - test2
   3 - test3
   4 - test4
  </code></pre>
  
  <p>How can I remove on each line all text before the <code>-</code>, so the text will look like:</p>
  
  <pre><code> test1
   test2
   test3
   test4
  </code></pre>