Issue 10220: switch to using string constants rather than integers for inspect.getgeneratorstate() return values and make debugging friendly str() and repr() for generator states a requirement in the test suite

Issue 10586: change the new functools.lru_cache implementation to expose the maximum and current cache sizes through the public statistics API. This API is now a single function that returns a named tuple.

Approved by Raymond Hettinger.

Handle multiple breakpoints at same line. Update docs/test.
Patch by Xavier de Gaye.

Amaury noticed that this was originally written in a way that would fail on
names that can't be encoded with the mbcs codec. Restructured the function
to work with wide names first then narrow names second, to fall in line
with the way other functions are written in posixmodule.c.

Approved by Guido (BDFL) and Georg (RM).

Remove parenthetical remark that is confusing now that the module is not named "__builtin__" anymore.