input: 
  from typing import List
  
  
  def detect_error(func: str) -> str:
      """ Analyzes the provided Python function to detect any potential errors.
      The function should return a string describing the error if found or "No errors detected" if there are no errors.
      >>> detect_error("def expand_list(list):\n    for item in list:\n        list *= 2")
      "The function is attempting to modify the list while iterating over it. This can lead to unexpected behavior and should be avoided. To fix the code, the list should be copied before the iteration takes place."
      >>> detect_error("def hello_world():\n    print('Hello, world!')")
      "No errors detected"
      """
  
output:     lines = func.split('\n')
      for i, line in enumerate(lines):
          if "for" in line and "in" in line and "list" in line:
              if "list" in lines[i+1] and ("*=" in lines[i+1] or "+=" in lines[i+1]):
                  return "The function is attempting to modify the list while iterating over it. This can lead to unexpected behavior and should be avoided. To fix the code, the list should be copied before the iteration takes place."
      return "No errors detected"