Subject: bug#2792: 23.0.90; doc string of switch-to-buffer

> Get rid of the word "WARNING" in the doc string. This is just helpful
> information, not a warning. Warnings are for things that are
> inherently dangerous.

It's inherently dangerous, in the sense that if I see a call to
`switch-to-buffer' in some Elisp code, I know it's a bug (the counter
examples are so rare they're not worth mentioning).