[PATCH 2 of 2 v2] histedit: add progress support

[Matt Mackall]

On Fri, 2015-12-18 at 00:23 -0600, timeless wrote:
> # HG changeset patch
> # User timeless <timeless at mozdev.org>
> # Date 1450419562 0
> #      Fri Dec 18 06:19:22 2015 +0000
> # Node ID 8cf12d5ffc8fdec608849ba3eacdd66f66fe5621
> # Parent  56d2e69bf248235298c2071af6faadf615045890
> histedit: add progress support

I've taken just this second patch for now, with s/editing/editting/,
thanks.
-- 
Mathematics is the supreme nostalgia of our time.