`time.clock()` was deprecated in 3.3, and marked for removal removal in
3.8; this thus remove it from the time module.

The combined Python and C coverage test runs now exceed Travis's
50-minute time limit. Splitting them into separate runs gives more
leeway.

Also, adding branch coverage to Python testing and ensure that
coverage is reported even if tests fail. (The primary builds are
for tracking test failures.)

In the parser, when using the type_comments=True option, recognize
a TYPE_IGNORE as anything containing `# type: ignore` followed by
a non-alphanumeric character. This is to allow ignores such as
`# type: ignore[E1000]`.

https://bugs.python.org/issue36884

Android still links to libpython.

Add "struct _ceval_runtime_state *ceval = &_PyRuntime.ceval;" local
variables to function to better highlight the dependency on the
global variable _PyRuntime and to point directly to _PyRuntime.ceval
field rather than on the larger _PyRuntime.

Changes:

* Add _PyRuntimeState_GetThreadState(runtime) macro.
* Add _PyEval_AddPendingCall(ceval, ...) and
  _PyThreadState_Swap(gilstate, ...) functions.
* _PyThreadState_GET() macro now calls
  _PyRuntimeState_GetThreadState() using &_PyRuntime.
* Add 'ceval' parameter to COMPUTE_EVAL_BREAKER(),
  SIGNAL_PENDING_SIGNALS(), _PyEval_SignalAsyncExc(),
  _PyEval_SignalReceived() and _PyEval_FiniThreads() macros and
  functions.
* Add 'tstate' parameter to call_function(), do_call_core() and
  do_raise().
* Add 'runtime' parameter to _Py_CURRENTLY_FINALIZING(),
  _Py_FinishPendingCalls() and _PyThreadState_DeleteExcept()
  macros and functions.
* Declare 'runtime', 'tstate', 'ceval' and 'eval_breaker' variables
  as constant.

The multiprocessing.resource_tracker replaces the multiprocessing.semaphore_tracker module. Other than semaphores, resource_tracker also tracks shared_memory segments. Patch by Pierre Glaser.

Fix a bug crashing SharedMemoryManager instances in interactive sessions after
a Ctrl-C (KeyboardInterrupt) was sent.

Add new trashcan macros to deal with a double deallocation that could occur when the `tp_dealloc` of a subclass calls the `tp_dealloc` of a base class and that base class uses the trashcan mechanism.

Patch by Jeroen Demeyer.

Patch by Kojo Idrissa.

Extended attributes can only be set on user-writeable files, but shutil previously
first chmod()ed the destination file to the source's permissions and then tried to
copy xattrs. This will cause failures if attempting to copy read-only files with
xattrs, as occurs with Git clones on Lustre FS.

Fix an issue where os.posix_spawn() would incorrectly raise a TypeError
when file_actions is None.

csv.DictWriter.writeheader() now returns the return value of the
underlying csv.Writer.writerow() method.

Patch contributed by Ashish Nitin Patil.

https://bugs.python.org/issue36601

Having multiple paragraphs in a few news entry lead to inconsistent
spacing while rendered in HTML by mixing "visually compact lists"
(when no entry of the whole list contains multiple paragraphs) and
"sparse lists" (when at least one do).

Thank you @redshiftzero on the first PR 👏 

If the PyObject_MALLOC() call failed in PyType_FromSpecWithBases(),
PyObject_Free() would be called on a static string in type_dealloc().

The Cache and Statement objects are undocumented and implementation
details of the sqlite3 module.

They aren't usable from pure Python code.

bpo-36851: Clean the frame stack if the execution ends with a return and the stack is not empty (GH-13191)

Also provide better grouping of the tokenizer tests.

Adds ㋿.

Enable custom reduction callback registration for functions and classes in
_pickle.c, using the new Pickler's attribute ``reducer_override``.

If a "=" is specified a the end of an f-string expression, the f-string will evaluate to the text of the expression, followed by '=', followed by the repr of the value of the expression.

Allow reduction methods to return a 6-item tuple where the 6th item specifies a
custom state-setting method that's called instead of the regular
``__setstate__`` method.

Co-Authored-By: brianquinlan <brian@sweetapp.com>