patch 8.2.0722: Vim9: not handling constant expression for elseif Commit: https://github.com/vim/vim/commit/7f14155f422ffcc997fc5a0b635a20a4bafd2093 Author: Bram Moolenaar <Bram@vim.org> Date: Sat May 9 17:35:53 2020 +0200 patch 8.2.0722: Vim9: not handling constant expression for elseif Problem: Vim9: not handling constant expression for elseif. Solution: Use postponed constants. Delete the code for evaluating a constant expression.

" Vim filetype plugin file
" Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
" Latest Revision:      2007-12-04

if exists("b:did_ftplugin")
  finish
endif
let b:did_ftplugin = 1

let s:cpo_save = &cpo
set cpo&vim

let b:undo_ftplugin = "setl com< cms< fo<"

setlocal comments=:# commentstring=#\ %s formatoptions-=t formatoptions+=croql

let &cpo = s:cpo_save
unlet s:cpo_save