[gbrainy] Explanation should be in singular

[Jordi Mas <jmas src gnome org>]

commit 5d47749ce69028218a7549cf4d8bc4233bcbbda5
Author: Jordi Mas <jmas softcatala org>
Date:   Tue Jan 29 21:15:10 2019 +0100

    Explanation should be in singular

 src/Games/Logic/PuzzleClocks.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/Games/Logic/PuzzleClocks.cs b/src/Games/Logic/PuzzleClocks.cs
index 21af28a1..e089ab78 100644
--- a/src/Games/Logic/PuzzleClocks.cs
+++ b/src/Games/Logic/PuzzleClocks.cs
@@ -46,7 +46,7 @@ namespace gbrainy.Games.Logic
                        get {
                                // Translators: {0} is replaced by 'Figure X'
                                return String.Format (Translations.GetString (
-                                       "Starting from the first clock, add {1} to the number obtained by 
appending the values to which the hands point. For example, the values of the hands for '{0}' are {3} ({2} + 
{1})."),
+                                       "Starting from the first clock, add {1} to the number obtained by 
appending the values to which the hands point. For example, the value of the hands for '{0}' is {3} ({2} + 
{1})."),
                                        Answer.GetFigureName (3), addition, handles [4].ToString () + handles 
[5].ToString (), handles [6].ToString () + handles [7].ToString ());
                        }
                }