Update lib/elixir/lib/exception.ex

Co-authored-by: José Valim <[email protected]>

Author: davydog187

lib/elixir/lib/exception.ex

@@ -1997,8 +1997,9 @@ defmodule Protocol.UndefinedError do
 
   @impl true
   def message(%{protocol: protocol, value: value, description: description}) do
-    "protocol #{inspect(protocol)} not implemented for #{inspect(value, pretty: true)} of type " <>
-      value_type(value) <> maybe_description(description) <> maybe_available(protocol)
+    "protocol #{inspect(protocol)} not implemented type " <> value_type(value) <>
+      maybe_description(description) <> maybe_available(protocol) <>
+      "\n\nGot value: #{inspect(value, pretty: true)}"
   end
 
   defp value_type(%{__struct__: struct}), do: "#{inspect(struct)} (a struct)"