[latexila] Change "Unsaved Document" to "Untitled Document"

[Sébastien Wilmet <swilmet src gnome org>]

commit 5e9980997baef7a93c5a99e036b40ab959d257a0
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Dec 18 16:18:24 2015 +0100

    Change "Unsaved Document" to "Untitled Document"
    
    It's more logical when saving the new file. Because having a file on the
    filesystem named "Unsaved Document 1.tex" is contradictory.
    
    gedit has made the same change recently, so it's also for consistency
    with other text editors.

 src/document.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/document.vala b/src/document.vala
index cb6941c..51aba3b 100644
--- a/src/document.vala
+++ b/src/document.vala
@@ -307,7 +307,7 @@ public class Document : Gtk.SourceBuffer
     private string get_unsaved_document_name ()
     {
         uint num = get_unsaved_document_num ();
-        return _("Unsaved Document") + @" $num";
+        return _("Untitled Document") + @" $num";
     }
 
     private uint get_unsaved_document_num ()