patch 9.0.1297: wrong value for $LC_CTYPE makes the environ test fail Commit: https://github.com/vim/vim/commit/962d91643520ec3748fcf5af3263d89ccfcdda92 Author: WuerfelDev <dev@wuerfeldev.de> Date: Fri Feb 10 20:49:08 2023 +0000 patch 9.0.1297: wrong value for $LC_CTYPE makes the environ test fail Problem: Wrong value for $LC_CTYPE makes the environ test fail. Solution: Unset $LC_CTYPE when running tests. (closes https://github.com/vim/vim/issues/11963)

" Vim filetype plugin file
" Language:	Objective C
" Maintainer:	Bram Moolenaar <Bram@vim.org>
" Last Change:	2003 Jan 15

" Only do this when not done yet for this buffer
if exists("b:did_ftplugin")
  finish
endif

" Behaves just like C
runtime! ftplugin/c.vim ftplugin/c_*.vim ftplugin/c/*.vim