[gcompris] Marked string as translatable

[Daniel Mustieles García <dmustieles src gnome org>]

commit 9903f247e2e9adf229189e6faf3f80b49e9eb6da
Author: Daniel Mustieles <daniel mustieles gmail com>
Date:   Fri Sep 6 11:42:04 2013 +0200

    Marked string as translatable

 .../piano_composition.xml.in                       |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/piano_composition-activity/piano_composition.xml.in 
b/src/piano_composition-activity/piano_composition.xml.in
index 28692dd..95a2b0d 100644
--- a/src/piano_composition-activity/piano_composition.xml.in
+++ b/src/piano_composition-activity/piano_composition.xml.in
@@ -43,13 +43,13 @@ The following keyboard bindings work in this activity:
   F4: G# / Ab
   F5: A# / Bb
 </_manual>
-        <credit>
+        <_credit>
         Thank you to Bruno Coudoin for his mentorship.
         Thank you to Olivier Samyn for his contribution to improving the note design and coloring.
         Thank you to Federico Mena who inspired me with his wonderful enthusiasm for my music projects at 
GUADEC.
         Thank you to all contributors of children's songs from around the world, especially the GNOME 
community. Learn more about these
         melodies and who contributed them here: https://live.gnome.org/GComprisMelodies
-        </credit>
+        </_credit>
   </Board>
   <Data directory=""/>
 </GCompris>