runtime(help): Update help syntax

This commit makaes the following changes to the vim help syntax:

- fix excessive URL detection in help, because `file:{filename}` in
  doc/options.txt is determined to be a URL.
- update highlighting N for :resize in help
- split Italian-specific syntax into separate help script
- highlight `Note` in parentheses in help
- update 'titlestring' behaviour in documentation for invalid '%' format

closes: #15883

Signed-off-by: Milly <milly.ca@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 32167d6..5d9a436 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim version 9.1.  Last change: 2024 Oct 14
+*builtin.txt*	For Vim version 9.1.  Last change: 2024 Oct 16
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -11954,7 +11954,7 @@
 		For example to make <c-j> work like <down> in wildmode, use: >
     :cnoremap <expr> <C-j> wildmenumode() ? "\<Down>\<Tab>" : "\<c-j>"
 <
-		(Note, this needs the 'wildcharm' option set appropriately).
+		(Note: this needs the 'wildcharm' option set appropriately).
 
 		Return type: |Number|