[WPT Export] Remove all newlines in GitHub auth header

third_party/WebKit/Tools/Scripts/webkitpy/w3c/wpt_github.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/w3c/wpt_github.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/wpt_github.py b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/wpt_github.py
index c5ab1ff4aebc19d97839f8290d66a7a03d6a5397..4412018a5f6f448db44fee610ea5318bf469aeff 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/wpt_github.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/wpt_github.py
@@ -22,7 +22,7 @@ class WPTGitHub(object):
         assert self.user and self.token
 
     def auth_token(self):
-        return base64.encodestring('{}:{}'.format(self.user, self.token)).strip()
+        return base64.b64encode('{}:{}'.format(self.user, self.token))
 
     def request(self, path, method, body=None):
         assert path.startswith('/')