recenter the visited source file. Its value can be a number (for example,
0 for top line, -1 for bottom line), or nil for no recentering.
-** The mode-line display a `@' if the default-directory for the current buffer
+** The mode-line displays a `@' if the default-directory for the current buffer
is on a remote machine, or a hyphen otherwise.
** The new command balance-window-area balances windows both vertically