patch 9.0.1438: .fs files are falsely recognized as forth files Commit: https://github.com/vim/vim/commit/065088d5549e7711668321cc5a77c9a9b684b142 Author: Johan Kotlinski <kotlinski@gmail.com> Date: Sun Apr 2 20:29:38 2023 +0100 patch 9.0.1438: .fs files are falsely recognized as forth files Problem: .fs files are falsely recognized as forth files. Solution: Check 100 lines for something that looks like forth. (Johan Kotlinski, closes #12219, closes #11988)

" Vim indent file
" Language:	Mail
" Maintainer:	Bram Moolenaar
" Last Change:	2021 Sep 26

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

" What works best is auto-indenting, disable other indenting.
" For formatting see the ftplugin.
setlocal autoindent nosmartindent nocindent indentexpr=

let b:undo_indent = "setl ai< cin< inde< si<"