[planner] Fixed typo.

[Alexandre Franke <afranke src gnome org>]

commit c2424b4620b0d3519c5f48b4e43722b51c0bbc3b
Author: 00willo <graham williamsonsinc id au>
Date:   Wed Feb 19 20:18:13 2014 +1100

    Fixed typo.

 docs/user-guide/C/planner.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/docs/user-guide/C/planner.xml b/docs/user-guide/C/planner.xml
index 7f0edbe..89827aa 100644
--- a/docs/user-guide/C/planner.xml
+++ b/docs/user-guide/C/planner.xml
@@ -128,7 +128,7 @@
        <date>17 May 2006</date> 
        <authorinitials>kmm</authorinitials>
        <revdescription> 
-         <para>Reorganized task usage section, breaking out 'Useing Gantt View' section</para>
+         <para>Reorganized task usage section, breaking out 'Using Gantt View' section</para>
          <para></para>
          <para>
            Additions for new features: