vim-patch:6c2fc37: 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: vim/vim#15883

6c2fc377bf

Co-authored-by: Milly <milly.ca@gmail.com>

runtime/lua/vim/_meta/options.lua

@@ -7310,7 +7310,9 @@ vim.go.titleold = vim.o.titleold
 --- window.  This happens only when the 'title' option is on.
 ---
 --- When this option contains printf-style '%' items, they will be
---- expanded according to the rules used for 'statusline'.
+--- expanded according to the rules used for 'statusline'.  If it contains
+--- an invalid '%' format, the value is used as-is and no error or warning
+--- will be given when the value is set.
 --- This option cannot be set in a modeline when 'modelineexpr' is off.
 ---
 --- Example:

runtime/lua/vim/_meta/vimfn.lua

@@ -10629,7 +10629,7 @@ function vim.fn.wait(timeout, condition, interval) end
 --- For example to make <c-j> work like <down> in wildmode, use: >vim
 ---     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 any
 function vim.fn.wildmenumode() end