code: function(piece, quote_char) {
              // Matches everything that is not a quote or \
              var regex = new RegExp("[^" + quote_char + "\\\\]", 'g');
              // Remove eveything that is not quote or \
              var replaced = piece.replace(regex, '');
              // Remove escaped quotes, then remove all remaining slashes, then count.
              return replaced.replace(
              	new RegExp('(\\\\' + quote_char + ')', 'g'), ''
  			).replace(
  				/\\/g, ''
  			).length;
          }
docs: Counts the number of unescaped quotes that the piece has.
  @private
  @param  {string} piece      The piece to evaluate.
  @param  {string} quote_char The quote character, either " or '.
  @return {number}            The number of unescaped quotes.