One long-standing irritation I have with the table of contents for the
Python Library Reference <http://docs.python.org/lib/lib.html>, is that
there is one very important section, "String Methods"
<http://docs.python.org/lib/string-methods.html>, which does not appear
there. That's because it is section 2.3.6.1, and the table of contents
only goes to 3 levels.