[TASK] (csbusortdirlist): use level three headings

util/csbusortdirlist.py

@@ -132,7 +132,7 @@ class Basetable():
         """
         Output a table
         """
-        os.write("== %s:%s ==\n" %
+        os.write("=== %s:%s ===\n" %
                 (self.datatype, self.collection))
         os.write("Data stream %s (type %s):\n" %
                 (self.collection, self.datatype))