[PATCH 1 of 3 topic-experiment] tutorial: use rm instead of 'hg rm' for an untracked temporary file

[Josef 'Jeff' Sipek]

# HG changeset patch
# User Josef 'Jeff' Sipek <jeffpc at josefsipek.net>
# Date 1499599224 -10800
#      Sun Jul 09 14:20:24 2017 +0300
# Branch stable
# Node ID db3830646e34220cfcac0837a33f9a8503dea5d2
# Parent  61e73c8fe169717105e832b23086683848a9ef53
tutorial: use rm instead of 'hg rm' for an untracked temporary file

diff --git a/tests/test-topic-tutorial.t b/tests/test-topic-tutorial.t
--- a/tests/test-topic-tutorial.t
+++ b/tests/test-topic-tutorial.t
@@ -385,9 +385,7 @@ They are seen as independant branch by M
   $ echo 'Coat' > shopping
   $ echo 'Shoes' >> shopping
   $ cat foo >> shopping
-  $ hg rm foo
-  not removing foo: file is untracked
-  [1]
+  $ rm foo
   $ hg ci -m 'add a pair of shoes'
   $ cd ../client