Added the undofile() function. Updated runtime files.
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index 229fdd6..109276f 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -828,7 +828,8 @@
DESKTOP *desktop.vim* *ft-desktop-syntax*
Primary goal of this syntax file is to highlight .desktop and .directory files
-according to freedesktop.org standard: http://pdx.freedesktop.org/Standards/
+according to freedesktop.org standard:
+http://standards.freedesktop.org/desktop-entry-spec/latest/
But actually almost none implements this standard fully. Thus it will
highlight all Unix ini files. But you can force strict highlighting according
to standard by placing this in your vimrc file: >