fix typos: waylans → wayland, SINLGE → SINGLE

src/blankWindow/blankWindow.vala

@@ -62,7 +62,7 @@ namespace XimperShellNotificationCenter {
             if (!GtkLayerShell.is_supported ()) {
                 stderr.printf ("GTKLAYERSHELL IS NOT SUPPORTED!\n");
                 stderr.printf ("Ximper Shell Notification Center only works on Wayland!\n");
-                stderr.printf ("If running waylans session, try running:\n");
+                stderr.printf ("If running wayland session, try running:\n");
                 stderr.printf ("\tGDK_BACKEND=wayland ximper-shell-notification-center\n");
                 Process.exit (1);
             }

src/controlCenter/widgets/notifications/notifications.vala

@@ -298,7 +298,7 @@ namespace XimperShellNotificationCenter.Widgets {
                 case "Return" :
                     if (group != null) {
                         var noti = group.get_latest_notification ();
-                        if (group.state == NotificationGroupState.SINLGE && noti != null) {
+                        if (group.state == NotificationGroupState.SINGLE && noti != null) {
                             noti.click_default_action ();
                             break;
                         }
@@ -309,7 +309,7 @@ namespace XimperShellNotificationCenter.Widgets {
                 case "BackSpace" :
                     if (group != null && n_groups > 0) {
                         unowned Notification ?noti = group.get_latest_notification ();
-                        if (group.state == NotificationGroupState.SINLGE && noti != null) {
+                        if (group.state == NotificationGroupState.SINGLE && noti != null) {
                             noti.request_dismiss_notification (ClosedReasons.DISMISSED, false);
                             break;
                         }

src/notificationGroup/notificationGroup.vala

 namespace XimperShellNotificationCenter {
     public enum NotificationGroupState {
         EMPTY = 0,
-        SINLGE = 1,
+        SINGLE = 1,
         MANY = 2;
     }
 
@@ -256,7 +256,7 @@ namespace XimperShellNotificationCenter {
 
         private void update_state () {
             state = group.n_children >
-                NotificationGroupState.SINLGE ? NotificationGroupState.MANY :
+                NotificationGroupState.SINGLE ? NotificationGroupState.MANY :
                 (NotificationGroupState) group.n_children;
 
             group.set_sensitive (!dismissed &&
@@ -355,7 +355,7 @@ namespace XimperShellNotificationCenter {
             // otherwise, animate the whole group (collapsed single-notification)
             if (state == NotificationGroupState.MANY) {
                 yield notification.remove_notification (!dismissed_by_swipe);
-            } else if (state == NotificationGroupState.SINLGE) {
+            } else if (state == NotificationGroupState.SINGLE) {
                 dismissed = true;
                 if (!yield play_remove_animation (!notification.dismissed_by_swipe)) {
                     debug ("Trying to play group removal animation twice. Ignoring");
@@ -368,7 +368,7 @@ namespace XimperShellNotificationCenter {
             group.remove (notification);
 
             update_state ();
-            if (state == NotificationGroupState.SINLGE) {
+            if (state == NotificationGroupState.SINGLE) {
                 set_expanded (false);
                 on_expand_change (false);
             }
@@ -383,7 +383,7 @@ namespace XimperShellNotificationCenter {
 
             // Skip animation if the notification was dismissed by swipe
             bool dismissed_by_swipe = this.dismissed_by_swipe;
-            if (state == NotificationGroupState.SINLGE) {
+            if (state == NotificationGroupState.SINGLE) {
                 unowned Notification ?noti = (Notification ?) group.get_first_widget ();
                 if (noti != null) {
                     dismissed_by_swipe |= noti.dismissed_by_swipe;

src/notificationWindow/notificationWindow.vala

@@ -20,7 +20,7 @@ namespace XimperShellNotificationCenter {
                 if (!GtkLayerShell.is_supported ()) {
                     stderr.printf ("GTKLAYERSHELL IS NOT SUPPORTED!\n");
                     stderr.printf ("Ximper Shell Notification Center only works on Wayland!\n");
-                    stderr.printf ("If running waylans session, try running:\n");
+                    stderr.printf ("If running wayland session, try running:\n");
                     stderr.printf ("\tGDK_BACKEND=wayland ximper-shell-notification-center\n");
                     Process.exit (1);
                 }