Python Docs Fix

[Terry Reedy]

A month ago, someone posted, under Python Docs Bugs, a complaint about the 
difficulty of finding the library ref sub-subsection on string methods. 
"That's because it is section 2.3.6.1, and the table of contents only goes 
to 3 levels."

I followed up the me-to's with an SF bug-report suggesting that the 
sub-sub-section somehow be lifted up a level so it would appear in the TOC.
www.python.org/sf/1514540

This weekend, in response, Andrew Kuchling moved the entire section on 
builtin types to chapter status, which will lift everything in that section 
up a level and make them more visible.

So thanks to Andrew for fixing this.

And a note that the volunteer Python developers sometimes do respond to 
polite comments and suggestions, including those originating from c.l.p. 
And also a note that while eventual posting to the tracker is necessary, I 
think most items by non-experts are best discussed here first, as happened 
with this one.  It certainly did not hurt that I reported that I was one of 
(at least) three agreeing with the OP.

Terry Jan Reedy