From 0c2bf55e909cfdb957be18352c807887ad53128e Mon Sep 17 00:00:00 2001
From: brianhuster <phambinhanctb2004@gmail.com>
Date: Tue, 13 May 2025 06:54:48 +0700
Subject: [PATCH] fix(tutor): l:lang is undefined

Problem:
The scope `elseif $LC_MESSAGES =~ '\a\a' || $LC_MESSAGES ==# "C"` in
function `s:Locale` in file `runtime/autoload/tutor.vim` leaves a case
when l:lang is not defined.

Solution:
Define `l:lang` at function scope instead of `if` scope

(cherry picked from commit e5665754d1b20a531d6168ad0efece486fb86a17)
---
 runtime/autoload/tutor.vim | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/runtime/autoload/tutor.vim b/runtime/autoload/tutor.vim
index 8e3e524649..26440e9af3 100644
--- a/runtime/autoload/tutor.vim
+++ b/runtime/autoload/tutor.vim
@@ -120,6 +120,8 @@ endfunction
 " Tutor Cmd: {{{1
 
 function! s:Locale()
+    " Make sure l:lang exists before returning.
+    let l:lang = 'en_US'
     if exists('v:lang') && v:lang =~ '\a\a'
         let l:lang = v:lang
     elseif $LC_ALL =~ '\a\a'
@@ -132,8 +134,6 @@ function! s:Locale()
       endif
     elseif $LANG =~ '\a\a'
         let l:lang = $LANG
-    else
-        let l:lang = 'en_US'
     endif
     return split(l:lang, '_')
 endfunction