Previously __path__ was set to [__name__], but that could lead to bad
results if someone managed to circumvent the frozen importer and
somehow ended up with a finder that thought __name__ was a legit
directory/location.

importlib.abc.Loader.init_module_attrs() and implement
importlib.abc.InspectLoader.load_module().

The importlib.abc.Loader.init_module_attrs() method sets the various
attributes on the module being loaded. It is done unconditionally to
support reloading. Typically people used
importlib.util.module_for_loader, but since that's a decorator there
was no way to override it's actions, so init_module_attrs() came into
existence to allow for overriding. This is also why module_for_loader
is now pending deprecation (having its other use replaced by
importlib.util.module_to_load).

All of this allowed for importlib.abc.InspectLoader.load_module() to
be implemented. At this point you can now implement a loader with
nothing more than get_code() (which only requires get_source();
package support requires is_package()). Thanks to init_module_attrs()
the implementation of load_module() is basically a context manager
containing 2 methods calls, a call to exec(), and a return statement.

control whether to reset the module's __name__ attribute in case a
reload is being done.

explains better what the context manager is providing.

Patch by Ronald Oussoren

Original patch by Hideaki Takahashi.

PyObject_CallMethod() now changed to `const char*`.
Based on patches by Jörg Müller and Lars Buitinck.

character in _decimal.c.

#17403: urllib.parse.robotparser normalizes the urls before adding to
ruleline. This helps in handling certain types invalid urls in a conservative
manner. Patch contributed by Mher Movsisyan.

This helps in handling certain types invalid urls in a conservative manner.

touchup test_idle. Rename README.txt.

is overriden with the CC environment variable, use the new compiler as
the default for linking if LDSHARED is not also overriden.  This restores
Distutils behavior introduced in 3.2.3 and inadvertently dropped in 3.3.0.

and __package__ unconditionally in order to do the right thing for
reloading.

handle providing (and cleaning up if needed) the module to be loaded.

A future commit will use the context manager in
Lib/importlib/_bootstrap.py and thus why the code is placed there
instead of in Lib/importlib/util.py.