Documentation: Fix building with Python 3.9

open(), io.open(), codecs.open() and fileinput.FileInput no longer accept 'U'
("universal newline") in the file mode.
This flag was deprecated since Python 3.3.
In Python 3, the "universal newline" is used by default when a file is open
in text mode.

Acked-by: Flavio Leitner <fbl@sysclose.org>
Reported-at: https://bugzilla.redhat.com/1791681
Reported-by: Miro Hrončok <mhroncok@redhat.com>
Signed-off-by: Timothy Redaelli <tredaelli@redhat.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>

diff --git a/Documentation/conf.py b/Documentation/conf.py
index 6bbfc02bdd09e07dbd9a99bc6b61364cefe6c07e..37d92c36f6a559d82ec946a789bca04d2f61cb35 100644 (file)
--- a/Documentation/conf.py
+++ b/Documentation/conf.py
@@ -58,7 +58,7 @@ author = u'The Open vSwitch Development Community'
 # The full version, including alpha/beta/rc tags.
 release = None
 filename = "../configure.ac"
-with open(filename, 'rU') as f:
+with open(filename, 'r') as f:
     for line in f:
         if 'AC_INIT' in line:
             # Parse "AC_INIT(openvswitch, 2.7.90, bugs@openvswitch.org)":