old_contents: import vim
  
  
  def focus(winnr):
      vim.command('%dwincmd w' % winnr)
  
  def close(winnr):
      focus(winnr)
      vim.command('wincmd c')
  
  def close_all():
      focus(1)
      vim.command('wincmd o')
  
  def split():
      vim.command('wincmd s')
  
  def vsplit():
      vim.command('wincmd v')
  
  def currentnr():
      return int(vim.eval('winnr()'))
  
  def pos():
      return vim.current.window.cursor
  
  
  class remain:
      def __enter__(self):
          self.curwindow = currentnr()
          self.pos = pos()
  
      def __exit__(self, type, value, traceback):
          focus(self.curwindow)
          vim.current.window.cursor = self.pos
  
  
new_contents: import vim
  
  
  def focus(winnr):
      vim.command('%dwincmd w' % winnr)
  
  def close_all():
      focus(1)
      vim.command('wincmd o')
  
  def split():
      vim.command('wincmd s')
  
  def vsplit():
      vim.command('wincmd v')
  
  def currentnr():
      return int(vim.eval('winnr()'))
  
  def pos():
      return vim.current.window.cursor
  
  
  class remain:
      def __enter__(self):
          self.curwindow = currentnr()
          self.pos = pos()
  
      def __exit__(self, type, value, traceback):
          focus(self.curwindow)
          vim.current.window.cursor = self.pos
  
  
subject: Remove unused function.