Incorrect message after new file created

[towry]

Description

It should only output [full_path] was properly created, but instead, it output Create file[full_path][full_path] was properly created

Neovim version

NVIM v0.7.0-dev+1387-gd73bf3138
Build type: Release
LuaJIT 2.1.0-beta3
Compiled by towry@towryDeMpb.local

Features: +acl +iconv +tui
See ":help feature-compile"

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/usr/local/Cellar/neovim/HEAD-d73bf31/share/nvim"

### Operating system and version

macOS  12.2.1

### nvim-tree version

924aa290921426682f86495cf64f48fcdab3c2fd

### Steps to reproduce

1. In the tree, press key `a` to add a file under a directory.
2. In the bottom, input the file name after the path `/Users/towry/xxx/xxxx/xx/new_file_name.lua`
3. press `Enter` key

### Expected behavior

It should only output `[full_path] was properly created`

### Actual behavior

It concatcate the previous message string with the new message string, making it hard to read.

### Minimal config

```Lua
vim.cmd [[set runtimepath=$VIMRUNTIME]]
vim.cmd [[set packpath=/tmp/nvt-min/site]]
local package_root = "/tmp/nvt-min/site/pack"
local install_path = package_root .. "/packer/start/packer.nvim"
local function load_plugins()
  require("packer").startup {
    {
      "wbthomason/packer.nvim",
      "kyazdani42/nvim-tree.lua",
      "kyazdani42/nvim-web-devicons",
      -- ADD PLUGINS THAT ARE _NECESSARY_ FOR REPRODUCING THE ISSUE
    },
    config = {
      package_root = package_root,
      compile_path = install_path .. "/plugin/packer_compiled.lua",
      display = { non_interactive = true },
    },
  }
end
if vim.fn.isdirectory(install_path) == 0 then
  print "Installing nvim-tree and dependencies."
  vim.fn.system { "git", "clone", "--depth=1", "https://github.com/wbthomason/packer.nvim", install_path }
end
load_plugins()
require("packer").sync()
vim.cmd [[autocmd User PackerComplete ++once echo "Ready!" | lua setup()]]
vim.opt.termguicolors = true
vim.opt.cursorline = true

-- MODIFY NVIM-TREE SETTINGS THAT ARE _NECESSARY_ FOR REPRODUCING THE ISSUE
_G.setup = function()
  require("nvim-tree").setup {}
end


https://github.com/towry/dotfiles/tree/master/link/.config/nvim