Issue 10626 investigation: regrtest now checks for alterations to the logging state in the current process (and yes, test_pydoc alters it)

even where os.symlink is not supported.

UnicodeEncodeError.

#7245: Add a SIGINT handler on continue in pdb that allows to break a program again by pressing Ctrl-C.

70% coverage at the moment (not tragic but needs work).

Removed static function complex_format, moved it into complex_repr. Modified tests to check both str and repr, which are the same for complex.

Use copysign to produce appropriately signed zeros instead of trying to worm around possible compiler optimizations.