[gnome-mines] Use Unicode in translatable strings

[Piotr Drąg <piotrdrag src gnome org>]

commit 20e70845da7b939f5634b41cb6b4b9d71be7e887
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sat Nov 12 13:41:25 2016 +0100

    Use Unicode in translatable strings
    
    See https://developer.gnome.org/hig/stable/typography.html
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772263

 data/gnome-mines.appdata.xml.in |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/data/gnome-mines.appdata.xml.in b/data/gnome-mines.appdata.xml.in
index b1d1a4b..e04d32e 100644
--- a/data/gnome-mines.appdata.xml.in
+++ b/data/gnome-mines.appdata.xml.in
@@ -11,13 +11,13 @@
     <_p>
       GNOME Mines is a puzzle game where you search for hidden mines. Flag the
       spaces with mines as quickly as possible to make the board a safer place. You
-      win the game when you've flagged every mine on the board. Be careful not to
+      win the game when you’ve flagged every mine on the board. Be careful not to
       trigger one, or the game is over!
     </_p>
     <_p>
       You can select the size of the field you want to play on at the start of the
-      game. If you get stuck, you can ask for a hint: there's a time penalty, but
-      that's better than hitting a mine!
+      game. If you get stuck, you can ask for a hint: there’s a time penalty, but
+      that’s better than hitting a mine!
     </_p>
   </description>
   <screenshots>