fixed nerdtree config issue

.vim/vimrc

@@ -57,7 +57,6 @@ Plug 'Xuyuanp/nerdtree-git-plugin'
 Plug 'tiagofumo/vim-nerdtree-syntax-highlight'
 Plug 'PhilRunninger/nerdtree-visual-selection'
 Plug 'tpope/vim-fugitive'
-Plug 'scrooloose/nerdtree', { 'on':  'NERDTreeToggle' }
 Plug 'tpope/vim-fireplace', { 'for': 'clojure' }
 Plug 'dense-analysis/ale'
 Plug 'jiangmiao/auto-pairs'
@@ -97,7 +96,16 @@ let g:coc_global_extensions = [
       \ 'coc-pyright',
       \ 'coc-go'
       \ ]
+let g:NERDTreeFileLines = 1
 
+" Start NERDTree and put the cursor back in the other window.
+autocmd VimEnter * NERDTree | wincmd p
+
+" Open the existing NERDTree on each new tab.
+autocmd BufWinEnter * if &buftype != 'quickfix' && getcmdwintype() == '' | silent NERDTreeMirror | endif
+
+" Exit Vim if NERDTree is the only window remaining in the only tab.
+autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() | call feedkeys(":quit\<CR>:\<BS>") | endif
 
 colorscheme gruvbox
 " " }}}
@@ -123,8 +131,7 @@ augroup END
 
 " More Vimscripts code goes here.
 
-" This toggles NerdTREE on startup
-autocmd vimenter * NERDTree 
+
 
 " }}}