vim-patch:9.2.1011: [security]: arbitrary Ex command execution during C omni-completion (#41501)

Problem:  arbitrary Ex command execution during C omni-completion via
          tag file names (Yazan Balawneh)
Solution: Escape the | for all returned tag files

Github Security Advisory:
https://github.com/vim/vim/security/advisories/GHSA-r77m-8m55-rpr6

https://github.com/vim/vim/commit/331d5d67028505c5b6043603a57d1e8497b922b5

Co-authored-by: Christian Brabandt <cb@256bit.org>

runtime/autoload/ccomplete.vim

@@ -533,7 +533,7 @@ endfunc
 " member.
 func s:StructMembers(typename, items, all)
   " Todo: What about local structures?
-  let fnames = join(map(tagfiles(), 'escape(v:val, " \\#%")'))
+  let fnames = join(map(tagfiles(), 'escape(v:val, " \\#%|")'))
   if fnames == ''
     return []
   endif