Issue 25311: Add support for f-strings to tokenize.py. Also added some comments to explain what's happening, since it's not so obvious.

not str.format call.

(tkinter._fix no longer exists in 3.5+)

rather than from elsewhere on PATH.

(by returning the original object unchanged).

(by returning the original object unchanged).

This removes the need to add externals/tcltk[64]/bin to PATH to be able
to import tkinter.  Also documents the necessity for the DLLs to be
on PATH or in python.exe's directory.

Moves Windows installer externals onto SVN and updates the build process to grab them automatically.

Moves Windows installer externals onto SVN and updates the build process to grab them automatically.

Patch written by Bernt Røskar Brenna.

self.__class__ in __repr__() and __reduce__() for simplicity and reliability.

self.__class__ in __repr__() and __reduce__() for simplicity and reliability.

Patch by Christie.

Patch by Christie.

Reported by Antony Lee.

Reported by Antony Lee.