-With a numeric arg, enable this display if arg is positive.
-
-When this display is enabled, it updates automatically every minute
-\(you can control the number of seconds between updates by
-customizing `display-time-interval').
-If `display-time-day-and-date' is non-nil, the current day and date
-are displayed as well.
-This runs the normal hook `display-time-hook' after each update."
+With a prefix argument ARG, enable Display Time mode if ARG is
+positive, and disable it otherwise. If called from Lisp, enable
+it if ARG is omitted or nil.
+
+When Display Time mode is enabled, it updates every minute (you
+can control the number of seconds between updates by customizing
+`display-time-interval'). If `display-time-day-and-date' is
+non-nil, the current day and date are displayed as well. This
+runs the normal hook `display-time-hook' after each update."