code: public String process(String content)
      {
          Matcher matcher = Pattern.compile( ELEMENT_BOUNDARY ).matcher( content );
  
          StringBuilder sb = new StringBuilder();
          int startIndex, matchIndex;
          for (startIndex = 0; matcher.find(); startIndex = matcher.end())
          {
              matchIndex = matcher.start();
              String preMatch = content.substring( startIndex, matchIndex );
              if (!StringUtil.isBlank( preMatch )) sb.append( span( preMatch ) );
              if (!StringUtil.isBlank( matcher.group( 2 ) )) sb.append( matcher.group() );
          }
          String postMatch = content.substring( startIndex, content.length() );
          if (!StringUtil.isBlank( postMatch )) sb.append( span( postMatch ) );
  
          return sb.toString();
      }
docs: {@inheritDoc}