runtime(doc): add help specific modeline to pi_tutor.txt

related: #6414

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/pi_tutor.txt b/runtime/doc/pi_tutor.txt
index 7aaafd1..0f8479e 100644
--- a/runtime/doc/pi_tutor.txt
+++ b/runtime/doc/pi_tutor.txt
@@ -1,11 +1,11 @@
-*pi_tutor.txt*    For Vim version 9.1.  Last change: 2024 Nov 02
+*pi_tutor.txt*    For Vim version 9.1.  Last change: 2024 Nov 03
 
 INTERACTIVE TUTORIALS FOR VIM			 *vim-tutor-mode*
 
 vim-tutor-mode provides a system to follow and create interactive tutorials
 for vim and third party plugins. It replaces the venerable `vimtutor` system.
 
-==============================================================================
+=============================================================================
 1. Usage                                                      *vim-tutor-usage*
 
 vim-tutor-mode tutorials are hypertext documents, they have rich text and
@@ -40,7 +40,7 @@
 It is recommended to use a less formal style when writing tutorials than in
 regular documentation (unless the content requires it).
 
-============================================================================
+=============================================================================
 3. Contributing
 
 Development of the plugin is done over at github [1].  Feel free to report
@@ -48,4 +48,5 @@
 
 [1]: https://github.com/fmoralesc/vim-tutor-mode
 
-" vim: set ft=help :
+=============================================================================
+ vim:tw=78:ts=8:noet:ft=help:norl: