patch 9.0.0901: setting w_leftcol and handling side effects is confusing Commit: https://github.com/vim/vim/commit/0c34d562647f029faca40f7733ccfb7b5377672b Author: Bram Moolenaar <Bram@vim.org> Date: Fri Nov 18 14:07:20 2022 +0000 patch 9.0.0901: setting w_leftcol and handling side effects is confusing Problem: Setting w_leftcol and handling side effects is confusing. Solution: Use a function to set w_leftcol() and handle side effects.

" Vim compiler file
" Compiler:     raco test (Racket command-line tools)
" Maintainer:   D. Ben Knoble <ben.knoble+github@gmail.com>
" URL:          https://github.com/benknoble/vim-racket
" Last Change: 2022 Aug 12

let current_compiler = 'racotest'

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

CompilerSet makeprg=raco\ test\ %
CompilerSet errorformat=location:%f:%l:%c