a sequence of characters that begins and 
                  ends with a designated &quot;quote character&quot;.  Within 
                  the token, any occurrence of the quote character 
                  is indicated by an adjacent pair of quote 
                  characters:  for example, if the quote character is 
 
                     &quot; 
 
                  then the token representing one instance of this 
                  character is 
 
                     &quot;&quot;&quot;&quot; 
 
       