bug#7573: 23.2; Info node Compilation is out of date

[Gareth Rees <gdr@garethrees.org>]

The Info node (emacs)Compilation says:

    If you want to run two compilations at once, you should start the
    first one, then rename the `*compilation*' buffer (perhaps using
    `rename-uniquely'; *note Misc Buffer::), and start the other
    compilation.  That will create a new `*compilation*' buffer.

This is out of date (and hence ineffective). The docstring for the
compile command says instead:

    To run more than one compilation at once, start one then rename
    the `*compilation*' buffer to some other name with
    M-x rename-buffer.  Then _switch buffers_ and start the new compilation.
    It will create a new `*compilation*' buffer.

The instruction to "switch buffers" in the docstring is missing from the
Info.

Just as a suggestion, I think that starting a second or subsequent
compilation in parallel is something that's common enough that it
deserves its own command.

-- 
Gareth Rees