patch 8.2.1320: Vim9: cannot declare some single letter variables Commit: https://github.com/vim/vim/commit/33afa2447bdb0bdd15253c69a2cf6f9903685815 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jul 29 19:18:00 2020 +0200 patch 8.2.1320: Vim9: cannot declare some single letter variables Problem: Vim9: cannot declare some single letter variables. Solution: Do not recognize a colon for a namespace for single letter variables. (closes #6547)

" Vim compiler file
" Compiler:     ATT dot
" Maintainer:	Marcos Macedo <bar4ka@bol.com.br>
" Last Change:	2004 May 16

if exists("current_compiler")
  finish
endif
let current_compiler = "dot"

if exists(":CompilerSet") != 2		" older Vim always used :setlocal
  command -nargs=* CompilerSet setlocal <args>
endif

CompilerSet makeprg=dot\ -T$*\ \"%:p\"\ -o\ \"%:p:r.$*\"