[gcompris] Minor, updated the manual of hydroelectric activity.

[Bruno Coudoin <bcoudoin src gnome org>]

commit 7c81bab2823abb5c8b5935174e1b4a62caa1d8e8
Author: Bruno Coudoin <bruno coudoin free fr>
Date:   Mon Jan 10 00:08:27 2011 +0100

    Minor, updated the manual of hydroelectric activity.

 src/hydroelectric-activity/hydroelectric.xml.in |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/hydroelectric-activity/hydroelectric.xml.in b/src/hydroelectric-activity/hydroelectric.xml.in
index 5b59c48..c6bf3d7 100644
--- a/src/hydroelectric-activity/hydroelectric.xml.in
+++ b/src/hydroelectric-activity/hydroelectric.xml.in
@@ -5,14 +5,14 @@
         type="python:hydroelectric"
         section="/experience"
         icon="hydroelectric.svg"
-        difficulty="3"
+        difficulty="4"
         author="Bruno Coudoin (bruno coudoin gcompris net)"
         boarddir=""
         demo="1">
-        <_title>Learn about an hydroelectric dam</_title>
+        <_title>Learn about an electrical system based on renewable energy</_title>
         <_description>Tux has come back from a long fishing party on his boat. Bring the electrical system back up so he can have light in his home.</_description>
         <_prerequisite></_prerequisite>
-        <_goal>Learn about an hydroelectric dam</_goal>
+        <_goal>Learn about an electrical system based on renewable energy</_goal>
 	<_manual>Click on different active elements : sun, cloud, dam, solar array, wind farm and transformers, in order to reactivate the entire electrical system. When the system is back up and Tux is in his home, push the light button for him. To win you must switch on all the consumers while all the producers are up.</_manual>
 	<_credit>Drawing by Stephane Cabaraux.</_credit>
   </Board>