title: Opening the most recently hidden buffer in Vim
body: <p>Assuming that I have two buffers. One is NERDTree, the other is an actually file I'm editing. I accidentally open an another file from NERDTree and the new file hides the previous file I was editing.</p>
  
  <p>A similar case occurs whether I use NERDTree or not.</p>
  
  <p>How can I bring back the previous state by opening the mostly recently hidden file? I'm using the word "hide" because this is probably not "closing".</p>