sys.executable can contain spaces, cater for this when passing it to
os.popen(). Fixes #692222.
diff --git a/Lib/test/test_atexit.py b/Lib/test/test_atexit.py
index 324b76e..1d120df 100644
--- a/Lib/test/test_atexit.py
+++ b/Lib/test/test_atexit.py
@@ -27,7 +27,7 @@
f.write(input)
f.close()
-p = popen("%s %s" % (executable, fname))
+p = popen('"%s" %s' % (executable, fname))
output = p.read()
p.close()
vereq(output, """\
@@ -55,7 +55,7 @@
f.write(input)
f.close()
-p = popen("%s %s" % (executable, fname))
+p = popen('"%s" %s' % (executable, fname))
output = p.read()
p.close()
vereq(output, """\