title: How can I use regular expressions in Textpad to remove anything, line by line, after specified characters?
body: <p>Suppose I have the following text in Textpad:</p>
  
  <pre><code>kwejkewrjl:ksajdlakj
  
  e833ekjh:skdjkahak
  
  2098e123809:ksjdkas
  
  dkjwhfdkjqhio:skjddksjal
  
  98a09asfdsaok:kwqjeo912ui
  </code></pre>
  
  <p>I would like to remove all characters from each line that occur after the colon.
  The new text should be:</p>
  
  <pre><code>kwejkewrjl:
  
  e833ekjh:
  
  2098e123809:
  
  dkjwhfdkjqhio:
  
  98a09asfdsaok:
  </code></pre>