Simplify internal calls and logic for _fix() and _fixexponents().
(Contributed by Facundo Batista.)

(Contributed by Gerrit Holl.  Reviewed by Jeff Epler.)

The shutils.rmtree() implementation uses an excessive amount of memory when
deleting large directory hierarchies. Before actually deleting any files, it
builds up a list of (function, filename) tuples for all the files that it is
going to remove.

[ 1030629 ] PyOS_InputHook broken

with a couple of utterly inconsequential changes by me.

(Contributed by Nick Coghlan.)

accept any iterable instead of only a sliceable object.

Closes bug #1039270.

the example so it does pass.

Closes bug #1038935.  Thanks Malte Helmert for spotting it.

SF bug #997050: Document, test, & check for non-string values in ConfigParser.  Moved the new string-only restriction added in rev. 1.65 to the SafeConfigParser class, leaving existing ConfigParser & RawConfigParser behavior alone, and documented the conditions under which non-string values work.

SF bug #1017864: ConfigParser now correctly handles default keys, processing them with ``ConfigParser.optionxform`` when supplied, consistent with the handling of config file entries and runtime-set options.