From 59bcb01d3bf58b810b9c48db56e558f3857110ad Mon Sep 17 00:00:00 2001
From: Alexander Courtis <alex@courtis.org>
Date: Mon, 27 Feb 2023 20:28:10 +1100
Subject: [PATCH] fix(#2024): help handles empty mapping description

---
 lua/nvim-tree/renderer/help.lua | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/lua/nvim-tree/renderer/help.lua b/lua/nvim-tree/renderer/help.lua
index 8a9f4ded..5670cd6c 100644
--- a/lua/nvim-tree/renderer/help.lua
+++ b/lua/nvim-tree/renderer/help.lua
@@ -23,10 +23,9 @@ end
 --- Remove prefix 'nvim-tree: '
 --- Hardcoded to keep default_on_attach simple
 --- @param desc string
---- @return string
---- @return number
+--- @return string|nil
 local function tidy_desc(desc)
-  return desc:gsub("^nvim%-tree: ", "")
+  return desc and desc:gsub("^nvim%-tree: ", "") or ""
 end
 
 -- sort lhs roughly as per :help index