[PATCH 2 of 2 evolve-ext] evolve: fix typo in fold docstring

[André Sintzoff]

# HG changeset patch
# User André Sintzoff <andre.sintzoff at gmail.com>
# Date 1435350408 -7200
#      Fri Jun 26 22:26:48 2015 +0200
# Branch stable
# Node ID e1538be9a6d885e796a6b0b2dfb6fd6b86757f39
# Parent  9b70f50f5bbb8f8cfe67d67fc07e2e940ca6a7c4
evolve: fix typo in fold docstring

diff -r 9b70f50f5bbb -r e1538be9a6d8 hgext/evolve.py
--- a/hgext/evolve.py	Fri Jun 26 22:25:57 2015 +0200
+++ b/hgext/evolve.py	Fri Jun 26 22:26:48 2015 +0200
@@ -2631,7 +2631,7 @@
        See :hg:`help phases` for more about draft revisions and
        :hg:`help revsets` for more about the `draft()` keyword
 
-     - Fold revisions between 3 andd 6 with the working directory parent::
+     - Fold revisions between 3 and 6 with the working directory parent::
 
          hg fold 3::6