patch 9.0.0230: no error for comma missing in list in :def function Commit: https://github.com/vim/vim/commit/2984ed31d92f7da19b3dc86b37764c55669dd7c2 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Aug 20 14:51:17 2022 +0100 patch 9.0.0230: no error for comma missing in list in :def function Problem: No error for comma missing in list in :def function. Solution: Check for missing comma. (closes https://github.com/vim/vim/issues/10943)

" Provide 'PrintVer' command to print the interface versions.

func s:print_ver(lang, ...)
  if has(a:lang)
    exec a:lang join(a:000)
  else
    echo 'N/A'
  endif
  echo ''
endfunc

command -nargs=+ PrintVer call <SID>print_ver(<f-args>)