tempfile's mkstemp(): Changed last argument from

binary=True
to
    text=False

by BDFL Pronouncement.  All other changes follow from this.  The change
to the docs is ready to go, but blocked by another JackMacLock in the
doc directory.

Lib/test/test_pkg.py

@@ -56,7 +56,7 @@ def runtest(hier, code):
     root = tempfile.mkdtemp()
     mkhier(root, hier)
     savepath = sys.path[:]
-    fd, fname = tempfile.mkstemp(binary=False)
+    fd, fname = tempfile.mkstemp(text=True)
     os.write(fd, code)
     os.close(fd)
     try: