environment variable name (str on UNIX), instead of using the encoded name
(bytes on UNIX).

variable name (str on UNIX), instead of using the encoded name (bytes on UNIX).

integers where appropriate.  Initial patch by Serhiy Storchaka.

PyErr_SetFromWindowsErrWithFilenameObject, and
PyErr_SetExcFromWindowsErrWithFilenameObject.

Note that PyErr_SetExcFromWindowsErrWithFilenameObjectAndSomeOtherParametersSoThatTheNameGetsSoLongThatNobodyIsEverGonnaUseThisStrangeFunctionForAnything is still undocumented.

The test was closing the orginal object instead the copy. This didn't result
in visible failures because the loop range was incorrect as well.