[PATCH] emacs: Don't record undo information for search or show buffers.

[David Bremner]

On Sun, 20 Nov 2011 20:00:55 -0500, Austin Clements <amdragon at MIT.EDU> wrote:
> There's no reason to record undo information for read-only,
> programmatically-constructed buffers.  The undo list just chews up
> memory keeping track of our calls to insert.

Pushed.

d