input: def analyze_function(func_code: str) -> str:
      """ Analyze the given Python function code to detect any potential errors and suggest a fix.
      >>> analyze_function("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:\\ndef expand_list(list):\\n    list_copy = list[:]   # make a copy of the list\\n    for item in list_copy:\\n        list *= 2'
      """
output:     import ast
      import astor
  
      class FunctionAnalyzer(ast.NodeVisitor):
          def __init__(self):
              self.issues = []
  
          def visit_For(self, node):
              if isinstance(node.iter, ast.Call) and isinstance(node.iter.func, ast.Name) and node.iter.func.id == 'range':
                  return
              for stmt in node.body:
                  if isinstance(stmt, ast.AugAssign) and isinstance(stmt.target, ast.Name) and stmt.target.id == node.iter.id:
                      self.issues.append((node.lineno, node.col_offset, "The function is attempting to modify the list while iterating over it. This can lead to unexpected behavior and should be avoided."))
  
      tree = ast.parse(func_code)
      analyzer = FunctionAnalyzer()
      analyzer.visit(tree)
  
      if not analyzer.issues:
          return "No issues detected."
  
      issue = analyzer.issues[0]
      line_no, col_offset, message = issue
      lines = func_code.split('\n')
      indent = ' ' * (col_offset + 4)
      lines[line_no - 1] = f"{indent}list_copy = list[:]   # make a copy of the list\n{lines[line_no - 1]}"
      lines[line_no - 1] = lines[line_no - 1].replace('list', 'list_copy', 1)
      return '\n'.join(lines)