Also synchronize with Python 3 examples. Based on patches by Matthew Boehm
and Alexander Schrijver.

by Jelle Zijlstra.

containing spaces.

Previously, when IDLE was started from a console or by import, a cascade
of warnings was emitted.  Patch by Serhiy Storchaka.

functools.partial objects.

for consistency with Python 3.

Implementation by Sean Rodman; test by Kaushik Nadikuditi.

This is how paste work on Windows, Mac, modern Linux apps, and ttk widgets.
The exception was X11 tk widgets.  Original patch by Serhiy Storchake.

  unused and outdated icons.

This matches the usage by BufferedReader, BufferedWriter, etc. Also document
and test that the write() methods should only access their argument before
they return.

Previous fix was only made to dead and removed code.