[iagno] Use Unicode apostrophes

[Piotr Drąg <piotrdrag src gnome org>]

commit 49ab8421fd1b65c34c55a5b3591286c545ec9108
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Tue Dec 5 17:33:28 2017 +0100

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

 data/iagno.appdata.xml.in        |    4 ++--
 data/org.gnome.iagno.gschema.xml |    2 +-
 src/iagno.vala                   |    2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/data/iagno.appdata.xml.in b/data/iagno.appdata.xml.in
index ee0dfd9..05c1732 100644
--- a/data/iagno.appdata.xml.in
+++ b/data/iagno.appdata.xml.in
@@ -13,9 +13,9 @@
       light on the other.
     </_p>
     <_p>
-      The object of Iagno is to flip as many of your opponent's tiles to your
+      The object of Iagno is to flip as many of your opponent’s tiles to your
       color as possible while preventing your opponent from flipping your tiles
-      to his color. This is done by trapping your opponent's tiles between two
+      to his color. This is done by trapping your opponent’s tiles between two
       tiles of your own color.
     </_p>
   </description>
diff --git a/data/org.gnome.iagno.gschema.xml b/data/org.gnome.iagno.gschema.xml
index 173340d..d1d6bd3 100644
--- a/data/org.gnome.iagno.gschema.xml
+++ b/data/org.gnome.iagno.gschema.xml
@@ -8,7 +8,7 @@
     <key name="computer-level" type="i">
       <default>1</default>
       <range min="1" max="3" />
-      <summary>Computer's AI level</summary>
+      <summary>Computer’s AI level</summary>
       <description>From 1, the easiest, to 3, the hardest.</description>
     </key>
     <key name="num-players" type="i">
diff --git a/src/iagno.vala b/src/iagno.vala
index 38d718b..f070e5e 100644
--- a/src/iagno.vala
+++ b/src/iagno.vala
@@ -58,7 +58,7 @@ public class Iagno : Gtk.Application
         { "alternative-start", 0, 0, OptionArg.NONE, ref alternative_start, N_("Start with an alternative 
position"), null},
         { "fast-mode", 'f', 0, OptionArg.NONE, ref fast_mode, N_("Reduce delay before AI moves"), null},
         { "first", 0, 0, OptionArg.NONE, null, N_("Play first"), null},
-        { "level", 'l', 0, OptionArg.STRING, ref level, N_("Set the level of the computer's AI"), "LEVEL"},
+        { "level", 'l', 0, OptionArg.STRING, ref level, N_("Set the level of the computer’s AI"), "LEVEL"},
         { "mute", 0, 0, OptionArg.NONE, null, N_("Turn off the sound"), null},
         { "second", 0, 0, OptionArg.NONE, null, N_("Play second"), null},
         { "size", 's', 0, OptionArg.INT, ref size, N_("Size of the board (debug only)"), "SIZE"},