[PATCH 1 of 3] singlehead: fix a small typo in a test comment

[Pierre-Yves David]

# HG changeset patch
# User Pierre-Yves David <pierre-yves.david at octobus.net>
# Date 1569407734 -7200
#      Wed Sep 25 12:35:34 2019 +0200
# Node ID 8a8b17fc108c6859633ea810935a123cb7937530
# Parent  39cab871e8801489fcb6022527d47607ada92fb6
# EXP-Topic enforce-single-head
# Available At https://bitbucket.org/octobus/mercurial-devel/
#              hg pull https://bitbucket.org/octobus/mercurial-devel/ -r 8a8b17fc108c
singlehead: fix a small typo in a test comment

The sentence is now correct.

diff --git a/tests/test-single-head.t b/tests/test-single-head.t
--- a/tests/test-single-head.t
+++ b/tests/test-single-head.t
@@ -113,8 +113,8 @@ Test single head enforcing - after rewri
   1 new obsolescence markers
   obsoleted 1 changesets
 
-Check it does to interfer with strip
-------------------------------------
+Check it does not interfer with strip
+-------------------------------------
 
 setup