Use Unicode in translatable strings

See https://developer.gnome.org/hig/stable/typography.html

https://bugzilla.gnome.org/show_bug.cgi?id=772210

data/org.gnome.shell.gschema.xml.in

@@ -26,7 +26,7 @@
       <summary>Disable user extensions</summary>
       <description>
         Disable all extensions the user has enabled without affecting
-        the 'enabled-extension' setting.
+        the “enabled-extension” setting.
       </description>
     </key>
     <key name="disable-extension-version-validation" type="b">
@@ -64,9 +64,9 @@
     </key>
     <key name="always-show-log-out" type="b">
       <default>false</default>
-      <summary>Always show the 'Log out' menu item in the user menu.</summary>
+      <summary>Always show the “Log out” menu item in the user menu.</summary>
       <description>
-        This key overrides the automatic hiding of the 'Log out'
+        This key overrides the automatic hiding of the “Log out”
         menu item in single-user, single-session situations.
       </description>
     </key>
@@ -76,7 +76,7 @@
       <description>
         The shell will request a password when an encrypted device or a
         remote filesystem is mounted.  If the password can be saved for
-        future use a 'Remember Password' checkbox will be present.
+        future use a “Remember Password” checkbox will be present.
         This key sets the default state of the checkbox.
       </description>
     </key>
@@ -105,9 +105,9 @@
     </key>
     <key name="toggle-application-view" type="as">
       <default>["&lt;Super&gt;a"]</default>
-      <summary>Keybinding to open the "Show Applications" view</summary>
+      <summary>Keybinding to open the “Show Applications” view</summary>
       <description>
-        Keybinding to open the "Show Applications" view of the Activities
+        Keybinding to open the “Show Applications” view of the Activities
         Overview.
       </description>
     </key>
@@ -176,8 +176,8 @@
       <summary>The application icon mode.</summary>
       <description>
 	Configures how the windows are shown in the switcher. Valid possibilities
-	are 'thumbnail-only' (shows a thumbnail of the window), 'app-icon-only'
+	are “thumbnail-only” (shows a thumbnail of the window), “app-icon-only”
-	(shows only the application icon) or 'both'.
+	(shows only the application icon) or “both”.
       </description>
     </key>
     <key type="b" name="current-workspace-only">

js/ui/components/polkitAgent.js

@@ -298,7 +298,7 @@ const AuthenticationDialog = new Lang.Class({
                  * requested authentication was not gained; this can happen
                  * because of an authentication error (like invalid password),
                  * for instance. */
-                this._errorMessageLabel.set_text(_("Sorry, that didn\'t work. Please try again."));
+                this._errorMessageLabel.set_text(_("Sorry, that didn’t work. Please try again."));
                 this._errorMessageLabel.show();
                 this._infoMessageLabel.hide();
                 this._nullMessageLabel.hide();

js/ui/shellMountOperation.js

@@ -380,7 +380,7 @@ const ShellMountPasswordDialog = new Lang.Class({
         this.setInitialKeyFocus(this._passwordEntry);
 
         this._errorMessageLabel = new St.Label({ style_class: 'prompt-dialog-error-label',
-                                                 text: _("Sorry, that didn\'t work. Please try again.") });
+                                                 text: _("Sorry, that didn’t work. Please try again.") });
         this._errorMessageLabel.clutter_text.ellipsize = Pango.EllipsizeMode.NONE;
         this._errorMessageLabel.clutter_text.line_wrap = true;
         this._errorMessageLabel.hide();

js/ui/status/network.js

@@ -1431,7 +1431,7 @@ const NMVPNConnectionItem = new Lang.Class({
         case NetworkManager.VPNConnectionState.PREPARE:
         case NetworkManager.VPNConnectionState.CONNECT:
         case NetworkManager.VPNConnectionState.IP_CONFIG_GET:
-            return _("connecting...");
+            return _("connecting…");
         case NetworkManager.VPNConnectionState.NEED_AUTH:
             /* Translators: this is for network connections that require some kind of key or password */
             return _("authentication required");

js/ui/windowManager.js

@@ -675,7 +675,7 @@ const ResizePopup = new Lang.Class({
     set: function(rect, displayW, displayH) {
         /* Translators: This represents the size of a window. The first number is
          * the width of the window and the second is the height. */
-        let text = _("%d x %d").format(displayW, displayH);
+        let text = _("%d × %d").format(displayW, displayH);
         this._label.set_text(text);
 
         this._widget.set_position(rect.x, rect.y);

src/main.c

@@ -390,7 +390,7 @@ GOptionEntry gnome_shell_options[] = {
   {
     "mode", 0, 0, G_OPTION_ARG_STRING,
     &session_mode,
-    N_("Use a specific mode, e.g. \"gdm\" for login screen"),
+    N_("Use a specific mode, e.g. “gdm” for login screen"),
     "MODE"
   },
   {