And use surrogates macros everywhere in unicodeobject.c

This fixes a regression compared to 2.x, where sys.modules.items()
returns a copy, as indicated by a comment in the source.  Diagnosis and
patch by Erik Tollerud.

It was already the case with Python 2.  However, the corresponding
sys module entries are now set to None (instead of an unusable file object).

It was already the case with Python 2.  However, the corresponding
sys module entries are now set to None (instead of an unusable file object).

Initial patch by Sjoerd de Vries.

Initial patch by Sjoerd de Vries.

MERGE: Closes issue #13488: Some old preprocessors have problem with #define not in the first column

Issue #13444: When stdout has been closed explicitly, we should not attempt to flush it at shutdown and print an error.

This also adds a test for issue #5319, whose resolution introduced the issue.

Issue #13444: When stdout has been closed explicitly, we should not attempt to flush it at shutdown and print an error.

This also adds a test for issue #5319, whose resolution introduced the issue.

sched.py: fix test_queue by making sure that queue property returns an orderd list of upcoming events

(where unsetenv() doesn't return a value).

(should fix a failure on the OpenIndiana AMD64 buildbot)