* lisp/window.el (fit-window-to-buffer): Fix doc-string.
Suggested by Drew Adams <drew.adams@oracle.com>
are specified in columns and include fringes, margins, a
scrollbar and a vertical divider, if any.
-If the optional argument `preserve-size' is non-nil, preserve the
+Optional argument PRESERVE-SIZE non-nil means to preserve the
size of WINDOW (see `window-preserve-size').
Fit pixelwise if the option `window-resize-pixelwise' is non-nil.