Make automatic installation script in wiki tips compatible with Neovim

[clebs]

When using the snippet to auto install everything on Neovim it does not recognise PlugInstall as a command without restarting. To solve this I added one line to the suggested tip to source Plug right after downloading it.

It now looks as follows (in lua):

local data_dir = fn.stdpath('data')
if vim.fn.empty(vim.fn.glob(data_dir .. '/site/autoload/plug.vim')) == 1 then
	vim.cmd('silent !curl -fLo ' ..
		data_dir ..
		'/site/autoload/plug.vim --create-dirs  https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim')
	vim.cmd('source ' .. data_dir .. '/site/autoload/plug.vim')
	vim.cmd('autocmd VimEnter * PlugInstall --sync | source $MYVIMRC')
end

Would it be possible to add this solution for those who get the error that PlugInstall is not a command on first setup with this tip?

NVIM v0.9.5
Build type: Release
LuaJIT 2.1.1703358377

• Type:
  • [ ] Bug
  • [x] Enhancement
  • [ ] Feature Request
  • [ ] Question
• OS:
  • [x] All/Other
  • [ ] Linux
  • [ ] macOS
  • [ ] Windows
• Vim:
  • [ ] Terminal Vim
  • [ ] GVim
  • [x] Neovim