title: How to strip leading and trailing quote from string, in Ruby
body: <p>I want to strip leading and trailing quotes, in Ruby, from a string.  The quote character will occur 0 or 1 time.  For example, all of the following should be converted to foo,bar:</p>
  
  <ul>
  <li><code>"foo,bar"</code></li>
  <li><code>"foo,bar</code></li>
  <li><code>foo,bar"</code></li>
  <li><code>foo,bar</code></li>
  </ul>