Fix calling write() from int instead of os

console/socketiod

@@ -176,7 +176,7 @@ def connect(sid, environ):
     if child_pid:
         # already started child process, don't start another
         # write a new line so that when a client refresh the shell prompt is printed
-        fd.write("\n")
+        os.write(fd, str.encode("\n"))
         return
 
     # create child process attached to a pty we can read from and write to