The tests now pass all combinations of -O/-OO and -B.  See also #7071
and #6292 for previous variations on the same theme.

test_versionpredicate needs a skip when sys.flags.optimize is true, but
I don’t know how to make that work with a DocTestSuite.

_posixsubprocess doesn't exist rather than simply stubbing it out
after the fact.  This adds coverage for the RuntimeWarning as well as
using the pure python _create_pipe instead of using
_posixsubprocess.cloexec_pipe unintentionally with the pure python
code.

Ironically: I don't think any platform should ever actually _use_ the
pure Python subprocess code on POSIX platforms anymore.  This at least
tests it properly in this stable branch.  The pure python code for
this is likely to be removed in 3.3.

ensure "make install" creates symlinks in --prefix bin for the "-32"
files in the framework bin directory like the installer does.

Patch by Mher Movsisyan.

Patch by Mher Movsisyan.

Mac OS X and FreeBSD to reduce the chances of a crash instead of a
"maximum recursion depth" RuntimeError exception.
(patch by Ronald Oussoren)

Mac OS X and FreeBSD to reduce the chances of a crash instead of a
"maximum recursion depth" RuntimeError exception.
(patch by Ronald Oussoren)

returns None.

an IOError if the file is closed.

the file is closed.