…onGH-32363)

It was drawn in the window background color and stood out with dark themes.

Co-authored-by: Terry Jan Reedy <[email protected]>

On GCC and clang, implement Py_MIN(), Py_MAX() and Py_ABS()
using typeof() and statement expression to only evaluate each
argument once and detect signed/unsigned comparison.

Test also these macros in test_cext and test_cppext to test different
compiler flags and test the limited C API.

…57431)

Add inject_memory_error() and memory_error_cm() functions to
test.support to inject memory errors: make the memory allocator fail.

…uns (python#157599)

Like Stack Viewer since pythonGH-17163, instead of a "Don't debug now" box.

Co-authored-by: Claude Opus 5 (1M context) <[email protected]>

…sport hangs on close() and after write errors (python#156921)

Co-authored-by: Kumar Aditya <[email protected]>