gone_in.9: Update to match printf-like change

[emaste]

Summary

Fixes: 01addd846c64 ("gone_in: make it __printflike()")

[ziaee]

Thanks for tagging me!

share/man/man9/gone_in.9

38

I don't really know how this is used. Is the ellipsis signifying that like, there can be a second "const char *msg"?

[emaste]

share/man/man9/gone_in.9

38

No, it means there are optional additional arguments (of unspecified type). See printf(3) or printf(9)

printf(const char *fmt, ...);

[emaste]

Rebase

[emaste]

gone_in and gone_in_dev append a message only before major, so the string would not get a newline otherwise.

We should add some sort of "Will be removed without further notice" message for >= major but I still think it makes sense to use the newline in the message passed to gone_in / gone_in_dev since the messages may be long and may be multiple lines already.

We should also rationalize the style for WARNING/Warning etc.