Most fixes to Doc/ and Lib/ directories by Ville Skyttä.

Patch by Xavier de Gaye.

Such fonts on Linux prevented the configuration dialog from opening.

Patch by Ville Skyttä.

Patch by A. Jesse Jiryu Davis.

format unit.

Issue #26741: asyncio: BaseSubprocessTransport._process_exited() now copies the
return code from the child watched to the returncode attribute of the Popen
object. On Python 3.6, it is required to avoid a ResourceWarning.

These added a path attribute to pathlib.Path objects, and docs.
Instead, we're going to use PEP 519.

(Starting in the 3.4 branch and merging forward from there since that's what I did originally.)

Issue #27057: Fix os.set_inheritable() on Android, ioctl() is blocked by
SELinux and fails with EACCESS. The function now falls back to fcntl().

Patch written by Michał Bednarski.

Removes versioning from py.exe launcher installer and ensures that old launchers are replaced by newer ones.

Patch by Xiang Zhang.