Alphasort ros2 node list output. (#305)

For node name order to be deterministic.

Signed-off-by: Michel Hidalgo <[email protected]>

Author: hidmic

ros2node/ros2node/verb/list.py

@@ -37,4 +37,4 @@ def main(self, *, args):
         if args.count_nodes:
             print(len(node_names))
         elif node_names:
-            print(*[n.full_name for n in node_names], sep='\n')
+            print(*sorted(n.full_name for n in node_names), sep='\n')