matrix: Room display name calculation method is now a property.

matrix/bar_items.py

@@ -50,7 +50,7 @@ def matrix_bar_item_name(data, item, window, buffer, extra_info):
             room = room_buffer.room
 
             return "{color}{name}".format(
-                color=W.color(color), name=room.display_name()
+                color=W.color(color), name=room.display_name
             )
 
         if buffer == server.server_buffer:

matrix/buffer.py

@@ -1065,7 +1065,7 @@ class RoomBuffer(object):
         self.update_buffer_name()
 
     def update_buffer_name(self):
-        room_name = self.room.display_name()
+        room_name = self.room.display_name
         self.weechat_buffer.short_name = room_name
 
     def _redact_line(self, event):

matrix/server.py

@@ -1062,7 +1062,7 @@ class MatrixServer(object):
                 self.info(
                     "You have been invited to {} {}({}{}{}){}"
                     "{}".format(
-                        room.display_name(),
+                        room.display_name,
                         W.color("chat_delimiters"),
                         W.color("chat_channel"),
                         room_id,