[PATCH 1 of 3 RFC] import: document --exact behavior in more detail

[Matt Mackall]

On Fri, 2016-03-11 at 13:25 -0500, Augie Fackler wrote:
> # HG changeset patch
> # User Matt Mackall <mpm at selenic.com>
> # Date 1457538453 18000
> #Â Â Â Â Â Â Wed Mar 09 10:47:33 2016 -0500
> # Node ID 288dbf95fd9eb74148d0d94f0b7a05a4d3d7b50d
> # Parent  8199ae50cd4b8bd89bf3d9b836ee10b9e49ba759
> # EXP-Topic import
> import: document --exact behavior in more detail

I'm taking your reposting of my patch as an implicit LGTM and queuing it for
default to ratchet this forward. 

--Â 
Mathematics is the supreme nostalgia of our time.