code: @Override
      public void processBody(ParserContext context) {
          StringBuilder body = new StringBuilder(context.getBody().length());
          if (!context.hasHeader()) {
              for (String line : context.getFileLines()) {
                  body.append(line).append("\n");
              }
              context.setBody(body.toString());
          }
          processAsciiDoc(context);
      }
docs: TODO: write tests with options and attributes