Feature Request - prepend to file

[Brock Noland]

Greetings,

I find myself for whatever reason, wanting to prepend a file (or
stdin) to a file. Most often when dealing XML that does not have a top
level tag.

This can be done safely in the shell but requires a lot of work.
(Maybe there is already a better way?)

If the source for such a command existed, would it be considered for
inclusion in coretuils?

Thanks,
Brock