docs: def format_underline(s, char="=", indents=0):
      """
      Traces a dashed line below string
  
      Args:
          s: string
          char:
          indents: number of leading intenting spaces
  
      Returns: list
  
      >>> print("\\n".join(format_underline("Life of João da Silva", "^", 2)))
        Life of João da Silva
        ^^^^^^^^^^^^^^^^^^^^^
      """
  
      n = len(s)
      ind = " " * indents
      return ["{}{}".format(ind, s), "{}{}".format(ind, char*n)]