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and io.StringIO objects now raise ValueError when the object has been closed.
Patch by Alessandro Moura.

Before, the type function was called twice in the case where the default
was specified and the argument was given as well.  This was especially
problematic for the FileType type, as a default file would always be
opened, even if a file argument was specified on the command line.

Patch by Arnaud Fontaine, with additional test by Mike Meyer.

Patch by Kushal Das.

Patch by Ludwig Hähne.

Initial patch by Anton Barkovsky.

Patch by Philipp Hagemeister.

Original patch by J Derek Wilson.

Patch by Jeff Knupp.

to avoid failing due to the select() file descriptor limit.

Contributed by Akintayo Holder and under the Google contributor agreement.

There was a window between the write and the chmod where the user’s
password would be exposed, depending on default permissions.  Philip
Jenvey’s patch fixes it.

These files are created by some NFS clients a file is edited and removed
concurrently (see added link in doc for more info).  If such a file is
removed between distutils calls listdir and copy, it will get confused.
Other special files are ignored in sdist (namely VCS directories), but
this has to be filtered out earlier.

Issue #14775: Fix a potential quadratic dict build-up due to the garbage collector repeatedly trying to untrack dicts.
Additional comments by Tim Silk.

Original patch by Stefano Taschini.

Patch by Serhiy Storchaka.

This avoids crashing the server loop when a signal is received.
Patch by Jerzy Kozera.

Patch by Francisco Martín Brugué

Closes #8033.

Initial patch by Torsten Landschoff.

Closes #11689.

Closes #9750

to PyShell.PyShell.transfer_path() and changing elsewhere as needed.
Original patches by Marco Scataglini and Roger Serwy.

Patch by Oleg Plakhotnyuk.

Initial patch by Johannes Vogel. Issue #13491.