now display special message when and only when there are failures.

Thanks to William Orr.

Patch from A Kaptur.

attribute.  Based on patch by Martin Panter.

test purposes are now reflected in GrepDialog and ReplaceDialog.  Docstrings
are improved. Initial patch by Saimadhav Heblikar

broken by the fix for security issue #19435.  Patch by Zach Byrne.

representations (on mips and m68k platforms).

due to possible uninitialized _config_vars.  Original patch by Alex Gaynor.

When ``None`` was passed as a ``REG_BINARY`` value to SetValueEx,
PyMem_DEL was called on an uninitialized buffer.  Patch by John Ehresman.

(Also an incidental typo fix in a comment in test_winreg)

it ignored I/O errors if at least the first C call read() succeed.

Backport of issue #16611.

The 2.7 tutorial introduction now matches the 3.x introduction as rewritten
by Ezio Melotti, with appropriate changes for 2.x.

to remove duplication and return info for tests.  Rewrite corresponding tests.
Test_create_option_buttons was not testing anything because of buggy
comparisons.  Use Python subscripting to get widget options.

moving them to the module's main function.