runtime(manpager): Strip OSC 8 hyperlink sequences in manpager plugin

fixes:  #19726
closes: #19787

Signed-off-by: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/plugin/manpager.vim

@@ -1,6 +1,7 @@
 " Vim plugin for using Vim as manpager.
 " Maintainer: Enno Nagel <ennonagel+vim@gmail.com>
 " Last Change: 2024 Jul 03
+" 2026 Mar 22 by Vim Project: strip OSC 9 sequences (#19787)
 
 if exists('g:loaded_manpager_plugin')
   finish
@@ -32,6 +33,9 @@ function s:ManPager()
   " Remove ansi sequences
   exe 'silent! keepj keepp %s/\v\e\[%(%(\d;)?\d{1,2})?[mK]//e' .. (&gdefault ? '' : 'g')
 
+  " Remove OSC 8 hyperlink sequences: \e]8;;...\e\ or \e]8;;...\a
+  exe 'silent! keepj keepp %s/\v\e\]8;[^\a\e]*%(\a|\e\\)//e' .. (&gdefault ? '' : 'g')
+
   " Remove empty lines above the header
   call cursor(1, 1)
   let n = search(".*(.*)", "c")