whole construct away, even when an 'else' clause is present::

    while 0:
        print("no")
    else:
        print("yes")

did not generate any code at all.

Now the compiler emits the 'else' block, like it already does for 'if' statements.

Will backport.

Shorter pprint's for empty sets and frozensets.  Fix indentation of frozensets.  Add tests including two complex data structures.

to not accept float types; the result was that integer-like objects
were not accepted.

Ported from release25-maint.

Also add a missing DECREF.

from the WeakValueDictionary was slower by nearly a factor of 3.

To avoid leaks, weakref proxies for the array types are put into the
cache dict, with weakref callbacks that removes the entries when the
type goes away.

- A few crashers fixed: weakref_in_del.py (issue #1377858);
  loosing_dict_ref.py (issue #1303614, test67.py);
  borrowed_ref_[34].py (not in tracker).

Clean-up and speed-up code by accessing numerator/denominator directly.  There's no reason to enforce readonliness

(also remove an unneeded import struct from test_largefile)

I'm not sure this is the correct fix, but at least the test passes
now and should be closer to correct.

Add first-cut at an approximation function (still needs rounding tweaks).  Add continued fraction conversions.

Issue 1743, Issue 1862.

The "can't load dll" message box on Windows is suppressed while an extension is loaded by calling SetErrorMode in dynload_win.c. The error is still reported properly.

Fixed bug #1915: Python compiles with --enable-unicode=no again. However several extension methods and modules do not work without unicode support.

improve portability of address length calculation for AF_UNIX sockets

users and groups in LDAP/NIS.  So I'm limiting the extra-heavy part of
the tests to passwd/group files with at most 1000 entries.