+ "Toggle Global Eldoc mode on or off.
+With a prefix argument ARG, enable Global Eldoc mode if ARG is
+positive, and disable it otherwise. If called from Lisp, enable
+the mode if ARG is omitted or nil, and toggle it if ARG is ‘toggle’.
+
+If Global Eldoc mode is on, `eldoc-mode' will be enabled in all
+buffers where it's applicable. These are buffers that have modes
+that have enabled eldoc support. See `eldoc-documentation-function'."
+ :group 'eldoc
+ :global t