(message "abc\ndef") displays a two line message, while
(message-box "%s" "abc\ndef") does not. Can the controlled two line
display be replicated in message-box?
M-x customize didn't seem to have a section for customizing
the message-box appearance (e.g. different background colors for the OK vs
the message). Can message-box's appearance be customized?
Can either of these issues be remedied by going to a pop-up (of some sort, e.g. x-popup-dialog), or some other emacs package?