use the built-in stacktrace formatter

Author: boydm

lib/scenic/scene.ex

@@ -637,18 +637,7 @@ defmodule Scenic.Scene do
         head_msg = "#{inspect(scene_module)} crashed during init"
         err_msg = inspect(err)
         args_msg = "args: #{inspect(args)}"
-
-        stack_msg =
-          Enum.reduce(__STACKTRACE__, [], fn
-            {mod, func, arity, [file: file, line: line]}, acc ->
-              [
-                "#{inspect(file)}:#{inspect(line)}: #{inspect(mod)}." <>
-                  "#{inspect(func)}/#{inspect(arity)}"
-                | acc
-              ]
-          end)
-          |> Enum.reverse()
-          |> Enum.join("\n")
+        stack_msg = Exception.format_stacktrace( __STACKTRACE__ )
 
         # assemble into a final message to output to the command line
         unless Mix.env() == :test do