chore:test(ex/data_case): update errors_on helper to phx.new temp…

…late

test/support/data_case.ex

@@ -40,7 +40,7 @@ defmodule Skate.DataCase do
   end
 
   @doc """
-  A helper that transform changeset errors to a map of messages.
+  A helper that transforms changeset errors into a map of messages.
 
       assert {:error, changeset} = Accounts.create_user(%{password: "short"})
       assert "password is too short" in errors_on(changeset).password
@@ -49,8 +49,8 @@ defmodule Skate.DataCase do
   """
   def errors_on(changeset) do
     Ecto.Changeset.traverse_errors(changeset, fn {message, opts} ->
-      Enum.reduce(opts, message, fn {key, value}, acc ->
-        String.replace(acc, "%{#{key}}", to_string(value))
+      Regex.replace(~r"%{(\w+)}", message, fn _, key ->
+        opts |> Keyword.get(String.to_existing_atom(key), key) |> to_string()
       end)
     end)
   end