with traceback_limit=1

Regression introduced by the implementation of the PEP 446 (non-inheritable
file descriptors by default).

master_fd must be set non-inheritable after the creation of the slave_fd,
otherwise grantpt(master_fd) fails with EPERM (errno 13).

name in their docstring. Patch written by Vajrasky Kok.

Also, replace unnessary uses of the #if preprocessor directive.

Document that @property can incorporate a docstring from the getter method.  Improve readabilty with additional whitespace.

I also removed some bare excepts from the tests.