docs: void processPackageInfo(String src, String filename, SimpleGroovyPackageDoc packageDoc) {
          String relPath = packageDoc.getRelativeRootPath();
          String description = calcThenSetPackageDescription(src, filename, relPath);
          packageDoc.setDescription(description);
          // get same description but with paths relative to root
          String altDescription = calcThenSetPackageDescription(src, filename, "");
          calcThenSetSummary(altDescription, packageDoc);
      }