[gnome-boxes] User docs: removed undesired whitespace

[Rafael Ferreira <rafaelff src gnome org>]

commit 3593655a4e87008612a3e565c6928c2f50d1aa04
Author: Rafael Ferreira <rafael f f1 gmail com>
Date:   Fri May 9 10:41:11 2014 -0300

    User docs: removed undesired whitespace

 help/C/system-requirements.page |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/help/C/system-requirements.page b/help/C/system-requirements.page
index 4837379..5476e6c 100644
--- a/help/C/system-requirements.page
+++ b/help/C/system-requirements.page
@@ -41,7 +41,7 @@
 
   <list>
     <item>
-      <p>20 GB of maximum storage space .</p>
+      <p>20 GB of maximum storage space.</p>
       <note style="advanced">
       <p>This does not mean that <app>Boxes</app> will allocate 20 GB of space
          when creating the virtual machine. The actual disk space used by