patch 8.2.0298: Vim9 script: cannot start command with a string constant Commit: https://github.com/vim/vim/commit/0c6ceaf90389b41545d803458c4813013811c756 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Feb 22 18:36:32 2020 +0100 patch 8.2.0298: Vim9 script: cannot start command with a string constant Problem: Vim9 script: cannot start command with a string constant. Solution: Recognize expression starting with '('.

" 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>)