[gtkmm-documentation] Fixed typo in string

[Daniel Mustieles GarcÃa <dmustieles src gnome org>]

commit 8a16c3e07a415755e7d85e151254243c8811b2da
Author: Daniel Mustieles <daniel mustieles gmail com>
Date:   Mon Mar 5 17:12:48 2012 +0100

    Fixed typo in string

 docs/tutorial/C/gtkmm-tutorial-in.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/docs/tutorial/C/gtkmm-tutorial-in.xml b/docs/tutorial/C/gtkmm-tutorial-in.xml
index 53fa551..677c489 100644
--- a/docs/tutorial/C/gtkmm-tutorial-in.xml
+++ b/docs/tutorial/C/gtkmm-tutorial-in.xml
@@ -2021,7 +2021,7 @@ different styles, as shown in this picture:
 Each line contains one horizontal <classname>Box</classname> with
 several buttons. Each of the buttons on a line is packed into the
 <classname>Box</classname> with the same arguments to the
-<methodname>pack_start()</methodname> method).
+<methodname>pack_start()</methodname> method.
 </para>
 
 <para>