"attribute" doesn't work in multiple lines

[a16]

Hi,

"attribute"(Generic attribute) works fine in single line, but it doesn't work in multiple lines.
Is this intentional? If not, I'll send a PR.

I guess it's a piece of cake...

diff --git a/lib/exabgp/configuration/ancient.py b/lib/exabgp/configuration/ancient.py
index 1c75eea..06e4ef4 100644
--- a/lib/exabgp/configuration/ancient.py
+++ b/lib/exabgp/configuration/ancient.py
@@ -1658,7 +1658,7 @@ class Configuration (object):
                                        'local-preference','atomic-aggregate','aggregator',
                                        'path-information','community','originator-id','cluster-list',
                                        'extended-community','split','label','rd','route-distinguisher',
-                                       'watchdog','withdraw'
+                                       'watchdog','withdraw','attribute'
                                ]
                        )
                        if r is False: return False

[thomas-mangin]

well spotted ! could you please send me a PR, please also update the CHANGELOG file to provide attribution, I will merge

[thomas-mangin]

Merged - thank you for the patch.