bug#49330: Customization buffer should also offer printing code snippets

[積丹尼 Dan Jacobson]

>>>>> "EZ" == Eli Zaretskii <eliz@gnu.org> writes:

EZ> What is that "code snippet" that you'd like to see?  If you want to
EZ> see the effect of customizing the face, then the Customize Face buffer
EZ> includes a "[sample]" part, which dynamically shows the results of
EZ> your customizations.

Yes, but that "sample" is not code.

Here is a standalone code snippet:
(custom-set-faces
 '(hl-line ((t (:underline t)))))