Igniter.Project.Config.configure/6 should do nothing when updater returns :error

[SteffenDE]

Versions

Elixir 1.18.4
Erlang/OTP 28.0.1

Operating system

macOS

Current Behavior

When the updater returns :error, a new config entry is added:

Update: config/config.exs

1 1   |import Config
2 2   |
3   - |config :my_app, foo: [
4   - |  bar: :baz
5   - |]
  3 + |config :my_app, foo: nil
6 4   |
  5 + |config :my_app,
  6 + |  foo: [
  7 + |    bar: :baz
  8 + |  ]
  9 + 

Reproduction

igniter =
  Igniter.Test.test_project(
    files: %{
      "config/config.exs" => """
      import Config

      config :my_app, foo: [
        bar: :baz
      ]
      """
    }
  )

if Igniter.Project.Config.configures_key?(igniter, "config.exs", :my_app, :foo) do
  Igniter.Project.Config.configure(igniter, "config.exs", :my_app, :foo, nil,
    updater: fn _zipper -> :error end
  )
else
  igniter
end
|> Igniter.Test.diff()
|> IO.puts()

Expected Behavior

The config should stay as is, since the updater failed.

[SteffenDE]

(it would also be nice if the :failure_message would be printed whenever the updater returns :error)