code: public String build() {
          
          // Add each scope to the scope list
          String s = "";
          for (RedditScope scope : scopes) {
              s += scope.value() + RedditScope.SEPARATOR;
          }
          
          // Remove final separator
          if (s.length() > 0) {
              s = s.substring(0, s.length() - RedditScope.SEPARATOR.length());
          }
          
          // Return scope list
          return s;
          
      }
docs: Build a string for the request. Called upon by
  <i>RedditToken</i> when requesting a token that
  allows scope definition.
  
  @return String list of the scopes