[shotwell] Remove one more instance of double spaces

[Piotr Drąg <piotrdrag src gnome org>]

commit 1a76ac6f4210c0f3707dcc5e719377279ad85ddb
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Mon Oct 3 13:21:13 2016 +0200

    Remove one more instance of double spaces

 src/Dialogs.vala |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/Dialogs.vala b/src/Dialogs.vala
index 2ec2679..4cc6d74 100644
--- a/src/Dialogs.vala
+++ b/src/Dialogs.vala
@@ -2756,8 +2756,8 @@ public void remove_from_app(Gee.Collection<MediaSource> sources, string dialog_t
     int num_not_removed = not_removed_photos.size + not_removed_videos.size;
     if (delete_backing && num_not_removed > 0) {
         string not_deleted_message = 
-            ngettext("The photo or video cannot be moved to your desktop trash.  Delete this file?",
-                "%d photos/videos cannot be moved to your desktop trash.  Delete these files?",
+            ngettext("The photo or video cannot be moved to your desktop trash. Delete this file?",
+                "%d photos/videos cannot be moved to your desktop trash. Delete these files?",
                 num_not_removed).printf(num_not_removed);
         Gtk.ResponseType result_delete = remove_from_filesystem_dialog(AppWindow.get_instance(), 
             dialog_title, not_deleted_message);