[gtk-doc] mkdb: add xi namespace when generating a new main-doc

[Stefan Sauer <stefkost src gnome org>]

commit 0cad1017294bd9b31bf00026a9057e19ee6c698d
Author: Stefan Sauer <ensonic users sf net>
Date:   Thu Jun 7 09:09:49 2018 +0200

    mkdb: add xi namespace when generating a new main-doc
    
    Otherwise we'll get
    "namespace error : Namespace prefix xi on include is not defined".
    Also fix some indentation in the generated output.

 gtkdoc/mkdb.py | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/gtkdoc/mkdb.py b/gtkdoc/mkdb.py
index 20eb389..37a6931 100644
--- a/gtkdoc/mkdb.py
+++ b/gtkdoc/mkdb.py
@@ -2450,7 +2450,7 @@ def OutputBook(main_file, book_top, book_bottom):
         logging.info("no master doc, create default one at: " + main_file)
 
         OUTPUT.write('''%s
-<book id="index">
+<book id="index" xmlns:xi="http://www.w3.org/2003/XInclude";>
   <bookinfo>
     <title>&package_name; Reference Manual</title>
     <releaseinfo>
@@ -2462,8 +2462,7 @@ def OutputBook(main_file, book_top, book_bottom):
 
   <chapter>
     <title>[Insert title here]</title>
-    %s
-  </chapter>
+%s  </chapter>
 ''' % (MakeDocHeader("book"), book_bottom))
         if os.path.exists('xml/tree_index.sgml'):
             OUTPUT.write('''  <chapter id="object-tree">