input: Write a function to design a positive feedback loop for the given Python program that prints "hello" 10 times. If the loop successfully completes, it should print "You've got it!". If the input program is an empty loop, the function should return an empty string.
  
  assert positive_feedback_loop_design("for i in range(10):\n    print(\"hello\")") == "for i in range(10):\n    print(\"hello\")\n    i += 1\n    if i == 10:\n        print(\"You've got it!\")"
  assert positive_feedback_loop_design("") == ""
output: def positive_feedback_loop_design(program):
      if program == "":
          return ""
      return f"{program}\n    i += 1\n    if i == 10:\n        print(\"You've got it!\")"