title: Salesforce Validation Rule ensuring field contains no line breaks
body: <p>I'm trying to write a data validation rule that ensures <code>Shipping Street</code> is one line (doesn't contain line breaks)</p>
  
  <p>I've tried things like<br>
  <code>CONTAINS( ShippingStreet , BR() )</code>, and<br>
  <code>CONTAINS( ShippingStreet , "\n" )</code>,<br>
  but I can't get the rule to trigger. </p>
  
  <p>Any help? </p>