code: def unquote_plus(string, encoding='utf-8', errors='replace'):
      
      string = string.replace('+', ' ')
      return unquote(string, encoding, errors)
docs: Like unquote(), but also replace plus signs by spaces, as required for
      unquoting HTML form values.
  
      unquote_plus('%7e/abc+def') -> '~/abc def'