From 645206e87f64de37180800466fdacee7228c9913 Mon Sep 17 00:00:00 2001
From: Tristan Kapous <10952525+tkapous@users.noreply.github.com>
Date: Thu, 9 Oct 2025 04:49:21 +0200
Subject: [PATCH] fix(undotree): error on `undotree.open()` with title as
 string #36085

---
 runtime/pack/dist/opt/nvim.undotree/lua/undotree.lua | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/runtime/pack/dist/opt/nvim.undotree/lua/undotree.lua b/runtime/pack/dist/opt/nvim.undotree/lua/undotree.lua
index 14875fa464..72734cbf2c 100644
--- a/runtime/pack/dist/opt/nvim.undotree/lua/undotree.lua
+++ b/runtime/pack/dist/opt/nvim.undotree/lua/undotree.lua
@@ -348,6 +348,8 @@ function M.open(opts)
     title = string.format('Undo tree for %s', vim.fn.fnamemodify(bufname, ':.'))
   elseif type(opts_title) == 'function' then
     title = opts_title(buf)
+  elseif type(opts_title) == 'string' then
+    title = opts_title
   end
 
   assert(type(title) == 'string', 'Window title must be a string')