Convert list comprehension to generator (#314)

Addresses flake8 C412 errors introduced by flake8-comprehension 2.2.0

Signed-off-by: Scott K Logan <logans@cottsay.net>

ros2node/ros2node/verb/info.py

@@ -40,7 +40,7 @@ def add_arguments(self, parser, cli_name):
     def main(self, *, args):
         with NodeStrategy(args) as node:
             node_names = get_node_names(node=node, include_hidden_nodes=True)
-        if args.node_name in [n.full_name for n in node_names]:
+        if args.node_name in (n.full_name for n in node_names):
             with DirectNode(args) as node:
                 print(args.node_name)
                 subscribers = get_subscriber_info(node=node, remote_node_name=args.node_name)