fix typo in tutorial

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/tutorial.txt

diff --git a/Documentation/tutorial.txt b/Documentation/tutorial.txt
index e2bbda5..a8c5efb 100644
--- a/Documentation/tutorial.txt
+++ b/Documentation/tutorial.txt
@@ -103,7 +103,7 @@
 $ git commit
 ------------------------------------------------
 
-This will again prompt your for a message describing the change, and then
+This will again prompt you for a message describing the change, and then
 record a new version of the project.
 
 Alternatively, instead of running `git add` beforehand, you can use