       end
 
     if opts[:format] == "dot" do
-      Mix.Utils.write_dot_graph!("xref_graph.dot", "xref graph",
-                                 root, callback, opts)
+      Mix.Utils.write_dot_graph!("xref_graph.dot", "xref graph", root, callback, opts)
+
       """
       Generated "xref_graph.dot" in the current directory. To generate a PNG:
 


  defp warnings(file, entries) do
    prefix = IO.ANSI.format([:yellow, "warning: "])
    warnings =
      Enum.map(Enum.sort(entries), fn entry ->
        message = message(entry)

    cond do
      excluded?(module, func, arity, excludes) ->
        nil

      skip?(module, func, arity) ->
        nil

      exports == :unknown_module ->
        {Enum.sort(lines), :unknown_module, module, func, arity, nil}

      is_atom(exports) and not function_exported?(module, func, arity) ->
        {Enum.sort(lines), :unknown_function, module, func, arity, nil}

      is_list(exports) and {func, arity} not in exports ->
        {Enum.sort(lines), :unknown_function, module, func, arity, exports}

      true ->
        nil
    end
