fix defaults for non-specified streams

tangostationcontrol/tangostationcontrol/devices/sdp/beamlet.py

@@ -657,7 +657,10 @@ class Beamlet(OPCUADevice):
 
         # Set MAC, IP, port
         for setting, value_if_undefined in [
-            ("FPGA_beamlet_output_multiple_hdr_eth_destination_mac_RW", "00:00:00:00:00:00"),
+            (
+                "FPGA_beamlet_output_multiple_hdr_eth_destination_mac_RW",
+                "00:00:00:00:00:00",
+            ),
             ("FPGA_beamlet_output_multiple_hdr_ip_destination_address_RW", "0.0.0.0"),
             ("FPGA_beamlet_output_multiple_hdr_udp_destination_port_RW", 0),
         ]: