runtime(vim): Update base-syntax, disallow '.' at start of menu item names 
(#14232)

Commit: 
https://github.com/vim/vim/commit/ec21bafc135a1e78d40e4fc9118e022bbab958e8
Author: dkearns <dougkea...@gmail.com>
Date:   Wed Mar 20 04:04:42 2024 +1100

    runtime(vim): Update base-syntax, disallow '.' at start of menu item names 
(https://github.com/vim/vim/issues/14232)
    
    Disallow '.' at the start of a menu item name.
    
    This is the menu path separator character and should be escaped with a
    '\' in this case.
    
    Partially fixes #14230.  "popup" is still incorrectly matched as the Ex
    command.
    
    Signed-off-by: Doug Kearns <dougkea...@gmail.com>
    Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/syntax/generator/vim.vim.base 
b/runtime/syntax/generator/vim.vim.base
index 6527be425..46285f3db 100644
--- a/runtime/syntax/generator/vim.vim.base
+++ b/runtime/syntax/generator/vim.vim.base
@@ -3,7 +3,7 @@
 " Maintainer:  Hirohito Higashi <h.east.727 ATMARK gmail.com>
 "      Doug Kearns <dougkea...@gmail.com>
 " URL: https://github.com/vim-jp/syntax-vim-ex
-" Last Change: 2024 Mar 18
+" Last Change: 2024 Mar 19
 " Former Maintainer: Charles E. Campbell
 " Base File URL:     http://www.drchip.org/astronaut/vim/index.html#SYNTAX_VIM
 " Base File Version: 9.0-25
@@ -498,8 +498,8 @@ syn case match
 syn keyword vimMenu popu[p] skipwhite nextgroup=vimMenuBang,vimMenuName
 syn region     vimMenuRhs       contained contains=@vimContinue,vimNotation 
start="|\@!\S"            skip=+\\\|\|\|
\s*\\|
\s*"\ + end="$" matchgroup=vimSep end="|"
 syn region     vimMenuRhsContinue contained contains=@vimContinue,vimNotation 
start=+^\s*\%(\\|"\ \)+ skip=+\\\|\|\|
\s*\\|
\s*"\ + end="$" matchgroup=vimSep end="|"
-syn match      vimMenuName     "\%(\\s\|\S\)\+"        contained 
contains=vimMenuNotation,vimNotation skipwhite        
nextgroup=vimCmdSep,vimMenuRhs
-syn match      vimMenuName     "\%(\\s\|\S\)\+\ze\s*$" contained 
contains=vimMenuNotation,vimNotation skipwhite skipnl 
nextgroup=vimCmdSep,vimMenuRhsContinue
+syn match      vimMenuName     "\.\@!\%(\\s\|\S\)\+"        contained 
contains=vimMenuNotation,vimNotation skipwhite        
nextgroup=vimCmdSep,vimMenuRhs
+syn match      vimMenuName     "\.\@!\%(\\s\|\S\)\+\ze\s*$" contained 
contains=vimMenuNotation,vimNotation skipwhite skipnl 
nextgroup=vimCmdSep,vimMenuRhsContinue
 syn match      vimMenuNotation "& \|&&\|\\s\|\\." contained
 syn match      vimMenuPriority "\<\d\+\%(\.\d\+\)*\>" contained skipwhite 
nextgroup=vimMenuName
 syn match      vimMenuMod      "

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