patch 8.1.1675: listener list not correctly updated on listener_remove() commit https://github.com/vim/vim/commit/7b73f914c4fc5a3f7ad97b678cc8137f964e3d62 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jul 13 13:03:02 2019 +0200 patch 8.1.1675: listener list not correctly updated on listener_remove() Problem: Listener list not correctly updated on listener_remove(). Solution: Only set "prev" when not removing a listener. Return one if the listener was found and removed.

" Logtalk filetype plugin file
" Language:         Logtalk
" Maintainer:       Paulo Moura <pmoura@logtalk.org>
" Latest Revision:  2018-08-03

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

let b:undo_ftplugin = "setl ts< sw< fdm< fdc< ai< dict<"

setlocal ts=4
setlocal sw=4
setlocal fdm=syntax
setlocal fdn=10
setlocal fdc=2
setlocal autoindent
setlocal dict=$VIMRUNTIME/ftplugin/logtalk.dict