Commit: runtime(env): add ftplugin for env filetype

[Christian Brabandt]

runtime(env): add ftplugin for env filetype

Commit: https://github.com/vim/vim/commit/9148644c1eb73faad702eacac2d40925c0c9a2d0
Author: snelling-a <72226000+...@users.noreply.github.com>
Date: Fri Feb 27 18:51:34 2026 +0000

runtime(env): add ftplugin for env filetype

Patch 9.2.0033 (https://github.com/vim/vim/issues/19260) introduced a dedicated `env` filetype for
.env files, which were previously detected as `sh`. This left env
files without `commentstring`, `comments`, or `formatoptions` since
no ftplugin was added alongside the new filetype.

Add runtime/ftplugin/env.vim to set these options, matching the
behavior that .env files had when they used the `sh` filetype.

closes: #19522

Signed-off-by: snelling-a <72226000+...@users.noreply.github.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/ftplugin/env.vim b/runtime/ftplugin/env.vim
new file mode 100644
index 000000000..ad1ee7f11
--- /dev/null
+++ b/runtime/ftplugin/env.vim
@@ -0,0 +1,19 @@
+" Vim filetype plugin file
+" Language: env
+" Maintainer: This runtime file is looking for a new maintainer.
+" Last Change: 2026 Feb 27
+
+if exists("b:did_ftplugin")
+ finish
+endif
+let b:did_ftplugin = 1
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+let b:undo_ftplugin = "setl com< cms< fo<"
+
+setlocal comments=b:# commentstring=#\ %s formatoptions-=t formatoptions+=croql
+
+let &cpo = s:cpo_save
+unlet s:cpo_save