title: M-x shell open shell in other windows
body: <p>In previous emacs, "M-x shell" new a shell buffer in current windows. </p>
  
  <p>but recently, I update my emacs to GNU Emacs 26.0.50.2. "M-x shell" new a shell buffer in the other windows. I search google and could not find answer.
  does anybody know how to prevent this behavior.</p>