   @doc """
   Checks if `string` contains any of the given `contents`.
 
-  `matches` can be either a single string or a list of strings.
+  `contents` can be either a single string or a list of strings.
 
   ## Examples
 

  defdelegate next_grapheme(string), to: String.Graphemes

  @doc """
  Returns the first grapheme from an utf8 string,
  `nil` if the string is empty.

  ## Examples

  end

  @doc """
  Returns the last grapheme from a utf8 string,
  `nil` if the string is empty.

  ## Examples
