The only documentation I can find about using the `:custom` keyword with use-package is "The :custom keyword allows customization of package custom variables."
I have no idea how to read that.
1. Can I do (recent-mode t)?
2. If I am to set a config option like dired-dwim-target to t do I write that: (dired-dwim-target t) or (setq dired-dwim-target t)?