refactor: add default value to string_control

client_jorobany.py

@@ -3,7 +3,7 @@ import socket
 class ClientJorobany:
     coding = 'utf-8'
 
-    def __init__(self, host, port, string_control):
+    def __init__(self, host, port, string_control='\n'):
         self.host = host
         self.port = port
         self.string_control = string_control