(defun elide-head (&optional arg)
"Hide header material in buffer according to `elide-head-headers-to-hide'.
-The header is made invisible with an overlay. With a prefix arg, show
-an elided material again.
+The header is made invisible with an overlay. With a prefix
+argument ARG, show an elided material again.
-This is suitable as an entry on `find-file-hook' or appropriate mode hooks."
+This is suitable as an entry on `find-file-hook' or appropriate
+mode hooks."
(declare (obsolete elide-head-mode "29.1"))
(interactive "P")
(if arg