[gnome-user-docs] Fixed a missing comma

[Alexandre Prokoudine <aprokoudine src gnome org>]

commit 7da6740e123827ae1724dced094ea3edcd5f5915
Author: Alexandre Prokoudine <alexandre prokoudine gmail com>
Date:   Wed Sep 21 00:04:43 2011 +0400

    Fixed a missing comma

 gnome-help/C/color-whyimportant.page |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gnome-help/C/color-whyimportant.page b/gnome-help/C/color-whyimportant.page
index 5ca8bd4..79010fa 100644
--- a/gnome-help/C/color-whyimportant.page
+++ b/gnome-help/C/color-whyimportant.page
@@ -84,7 +84,7 @@
 
   <p>
     In some cases we can <em>correct</em> the device response by altering
-    the data we sent to the device but in other cases where that's not
+    the data we sent to the device, but in other cases where that's not
     possible (you can't print electric blue) we need to show the user
     what the result is going to look like.
   </p>