- "Toggle Auto-Composition mode in every possible buffer.
-With prefix arg, turn Global-Auto-Composition mode on if and only if arg
-is positive.
-See `auto-composition-mode' for more information on Auto-Composition mode."
+ "Toggle Auto Composition mode in all buffers.
+With a prefix argument ARG, enable it if ARG is positive, and
+disable it otherwise. If called from Lisp, enable it if ARG is
+omitted or nil.
+
+For more information on Auto Composition mode, see
+`auto-composition-mode' ."