[PATCH stable] histedit: fix typo in documentation

[Matt Mackall]

On Wed, 2016-02-03 at 11:06 -0200, Wagner Bruna wrote:
> # HG changeset patch
> # User Wagner Bruna <wbruna at softwareexpress.com.br>
> # Date 1454504471 7200
> #      Wed Feb 03 11:01:11 2016 -0200
> # Branch stable
> # Node ID 0f0a02362ca043b139293ef4dc6aa543b5de1d88
> # Parent  f5d06d31b7937249ed8e02fa3ea5af867130eb2d
> histedit: fix typo in documentation

Queued for stable, thanks.

-- 
Mathematics is the supreme nostalgia of our time.