diff --git a/src/activities/color_mix_light/ActivityInfo.qml b/src/activities/color_mix_light/ActivityInfo.qml
index 06210a0b9..8583a0d28 100644
--- a/src/activities/color_mix_light/ActivityInfo.qml
+++ b/src/activities/color_mix_light/ActivityInfo.qml
@@ -1,44 +1,43 @@
 /* GCompris - ActivityInfo.qml
  *
  * Copyright (C) 2015 Stephane Mankowski <stephane@mankowski.fr>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 3 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 import GCompris 1.0
 
 ActivityInfo {
   name: "color_mix_light/ColorMixLight.qml"
   difficulty: 4
   icon: "color_mix_light/color_mix_light.svg"
   author: "Stephane Mankowski &lt;stephane@mankowski.fr&gt;"
   demo: true
   //: Activity title
   title: qsTr("Mixing colors of light")
   //: Help title
   description: qsTr("Discover light color mixing.")
 //  intro: "Match the colour by moving the sliders on the torches"
   //: Help goal
   goal: qsTr("Mix the primary colors to match to the given color.")
   //: Help prerequisite
   prerequisite: ""
   //: Help manual
   manual: qsTr("
 The activity deals with mixing primary colors of light (additive mixing).
 
-In case of light it is just the opposite of mixing color with paints! The more light you add the lighter the resultant color will get. Primary colors of light are red, green and blue.
-        ")
+In case of light it is just the opposite of mixing color with paints! The more light you add the lighter the resultant color will get. Primary colors of light are red, green and blue.")
   credit: qsTr("Images from http://openclipart.org")
   section: "experiment color"
   createdInVersion: 0
 }