Add a missing versionadded for get_banner

1 files changed, 2 insertions, 0 deletions

diff --git a/paramiko/transport.py b/paramiko/transport.py
index 296d6eb7..ab30f058 100644
--- a/paramiko/transport.py
+++ b/paramiko/transport.py
@@ -966,6 +966,8 @@ class Transport (threading.Thread):
         supplied, this method returns ``None``.
 
         :returns: server supplied banner (`str`), or ``None``.
+
+        .. versionadded:: 1.13
         """
         if not self.active or (self.auth_handler is None):
             return None