title: How to say any character except dash ("-")
body: <p>How to do we compose a regex that says "the matches fails if there's a dash somewhere in the middle"</p>
  
  <p>I have several lines that are composed as 3958.3r - 5v and some are without the dash for example: 3958.3v4r. I am able to get the ones with the dash, but not only the ones without the dash</p>