input: Write a function to design a positive feedback loop for the given Python program. The function should modify the original program to include a positive feedback mechanism that prints "You've got it!" when the loop completes.
  
  
  assert positive_feedback_loop("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("for i in range(5):\n    print(\"hi\")") == "for i in range(5):\n    print(\"hi\")\n    i += 1\n    if i == 5:\n        print(\"You've got it!\")"
  assert positive_feedback_loop("for i in range(1):\n    print(\"greeting\")") == "for i in range(1):\n    print(\"greeting\")\n    i += 1\n    if i == 1:\n        print(\"You've got it!\")"
  
output: def positive_feedback_loop(code):
      lines = code.split('\n')
      loop_line = lines[0]
      loop_var = loop_line.split()[1].split(' ')[0]
      loop_range = loop_line.split('(')[1].split(')')[0]
      feedback_code = f"    {loop_var} += 1\n    if {loop_var} == {loop_range}:\n        print(\"You've got it!\")"
      return '\n'.join(lines) + '\n' + feedback_code