title: stripping singular / from a csv file
body: <p>I have a csv file which has a few areas where / proceeded by nothing and proceeded by nothing that I'd like to strip out.  The catch is, I also have other items in the file which have a / that I don't want to strip out.</p>
  
  <p>an example:</p>
  
  <pre><code>/abc, /, akaksdhfaiwe
  /, /foo, /bar
  </code></pre>
  
  <p>I'd like to be:</p>
  
  <pre><code>/abc,, akaksdhfaiwe
  , /foo, /bar
  </code></pre>
  
  <p>How do I do this?  I can't use gsub('^/', '') because it would strip out the /abc /foo /bar.  And for the life of me, I can't seem to find an 'ends with'.  I was hoping that \Z would work, no luck.</p>
  
  <p>Any takers?</p>
  
  <p>I've been using fasterCSV for a lot of the manipulation which has been pretty great so far.</p>