runtime(doc): update formatting and syntax

closes: #15800

Signed-off-by: Milly <milly.ca@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/vi_diff.txt b/runtime/doc/vi_diff.txt
index 3bcee47..58bce5e 100644
--- a/runtime/doc/vi_diff.txt
+++ b/runtime/doc/vi_diff.txt
@@ -1,4 +1,4 @@
-*vi_diff.txt*   For Vim version 9.1.  Last change: 2024 May 15
+*vi_diff.txt*   For Vim version 9.1.  Last change: 2024 Oct 05
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -119,11 +119,11 @@
 	considered to be a bug, or at least need improvement.  But still, Vim
 	starts in a mode which behaves like the "real" Vi as much as possible.
 	To make Vim behave a little bit better, try resetting the 'compatible'
-	option:
+	option: >
 		:set nocompatible
-	Or start Vim with the "-N" argument:
+<	Or start Vim with the "-N" argument: >
 		vim -N
-	Vim starts with 'nocompatible' automatically if you have a .vimrc
+<	Vim starts with 'nocompatible' automatically if you have a .vimrc
 	file.  See |startup|.
 	The 'cpoptions' option can be used to set Vi compatibility on/off for
 	a number of specific items.