use assert[Not]In where appropriate
A patch from Dave Malcolm.
diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index 4326e65..4dc34ce 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -502,7 +502,7 @@
# it reasonable to get the host's addr in addition to 0.0.0.0.
# At least for eCos. This is required for the S/390 to pass.
my_ip_addr = socket.gethostbyname(socket.gethostname())
- self.assertTrue(name[0] in ("0.0.0.0", my_ip_addr), '%s invalid' % name[0])
+ self.assertIn(name[0], ("0.0.0.0", my_ip_addr), '%s invalid' % name[0])
self.assertEqual(name[1], port)
def testGetSockOpt(self):