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:	Unit testing tool for Python
" Maintainer:	Max Ischenko <mfi@ukr.net>
" Last Change: 2004 Mar 27

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

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

CompilerSet efm=%C\ %.%#,%A\ \ File\ \"%f\"\\,\ line\ %l%.%#,%Z%[%^\ ]%\\@=%m