[gtkmm-documentation] Fixed typo in string

[Daniel Mustieles GarcÃa <dmustieles src gnome org>]

commit b2c49b4f356cea62c808f7cecd2adef698a55dc1
Author: Daniel Mustieles <daniel mustieles gmail com>
Date:   Thu Aug 2 20:55:12 2012 +0200

    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 fa5d67e..c541a9b 100644
--- a/docs/tutorial/C/gtkmm-tutorial-in.xml
+++ b/docs/tutorial/C/gtkmm-tutorial-in.xml
@@ -7417,7 +7417,7 @@ initialized to null so you don't need to remember to do that yourself.
 <para>
 The use of the <literal>const</literal> keyword in C++ is not always clear. You
 might not realise that <type>const Something*</type> declares a pointer to a
-<type>const Something</type>, The pointer can be changed, but not the
+<type>const Something</type>. The pointer can be changed, but not the
 <type>Something</type> that it points to.
 </para>
 <para>