runtime(vim): Update base-syntax, always match continuation comments to EOL

closes: #16630

Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index 0d4082a..8bb91e3 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -1161,8 +1161,8 @@
 syn match	vimShebang	"\%^#!.*" display
 
 syn match	vimContinue		"^\s*\zs\\"
-syn match         vimContinueComment	'^\s*\zs["#]\\ .*'
-syn match         vim9ContinueComment	"^\s*\zs#\\ .*"
+syn match	vimContinueComment	'^\s*\zs["#]\\ .*' extend
+syn match	vim9ContinueComment	"^\s*\zs#\\ .*"	 extend
 syn cluster	vimContinue	contains=vimContinue,vimContinueComment
 syn cluster	vim9Continue	contains=vimContinue,vim9ContinueComment