Replace file with open for 3.x
diff --git a/OpenSSL/test/test_ssl.py b/OpenSSL/test/test_ssl.py
index 66faa01..f645ad5 100644
--- a/OpenSSL/test/test_ssl.py
+++ b/OpenSSL/test/test_ssl.py
@@ -685,7 +685,7 @@
             fObj = open(name, 'w')
             fObj.write(dump_certificate(FILETYPE_PEM, cert).decode('ascii'))
             fObj.close()
-            fObj = file(name.replace('pem', 'asn1'), 'w')
+            fObj = open(name.replace('pem', 'asn1'), 'w')
             fObj.write(dump_certificate(FILETYPE_ASN1, cert))
             fObj.close()