code: public Section addAppendicesSection(SoftwareSystem softwareSystem, File... files) throws IOException {
          return addSection(softwareSystem, "Appendices", files);
      }
docs: Adds an "Appendices" section relating to a {@link SoftwareSystem} from one or more files.
  
  @param softwareSystem    the {@link SoftwareSystem} the documentation content relates to
  @param files             one or more File objects that point to the documentation content
  @return                  a documentation {@link Section}
  @throws IOException      if there is an error reading the files