[gcompris] fixed an english sentence.

[Bruno Coudoin <bcoudoin src gnome org>]

commit bca3f1d0d348be5ade370793bbb2e86495064476
Author: GonÃalo Cordeiro <gzcordeiro gmail com>
Date:   Sat Oct 27 19:51:20 2012 +0200

    fixed an english sentence.

 src/play_piano-activity/play_piano.xml.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/play_piano-activity/play_piano.xml.in b/src/play_piano-activity/play_piano.xml.in
index 8509e0e..ad4cbfc 100644
--- a/src/play_piano-activity/play_piano.xml.in
+++ b/src/play_piano-activity/play_piano.xml.in
@@ -13,7 +13,7 @@
 	<_title>Play Piano!</_title>
         <_description>Learn to play melodies on the piano keyboard!</_description>
         <_prerequisite>Knowledge of musical notation and musical staff. Play the activity named 'Piano Composition' first.</_prerequisite>
-        <_goal>understand how the piano keyboard can play music as written on the musical staff</_goal>
+        <_goal>Understand how the piano keyboard can play music as written on the musical staff.</_goal>
         <_manual xml:space="preserve">The notes you see will be played to you. Click on the corresponding keys on the keyboard that match the notes you hear and see. All levels except for the last have the notes colored so you can match the notes to the keyboard colors. Each level increases in difficulty by adding more notes. Levels 1-6 test the treble clef, levels 7-12 test the bass clef. When you get five points, you move onto the next level (incorrect answers deduct points, correct answers add points).
 
 The following keyboard bindings work in this game: