[PATCH] update: do not remove cwd

[Matt Mackall]

On Tue, 2016-08-30 at 20:15 +0000, Stanislau Hlebik wrote:
> Makes sense. But Durham's idea about warning seems legit. When i ran into this
> problem when doing 'hg split', i spent a few minutes figuring out where the
> problem came from. If i had warning like 'your cwd was deleted; if it causes
> problems go to the root' i'd found the solution sooner.

A warning seems reasonable to me.

-- 
Mathematics is the supreme nostalgia of our time.