Using other separators leads to the error
.BR EINVAL .
.TP
-.I /proc/sys/debug/
-This directory may be empty.
-.TP
.I /proc/sys/dev/
This directory contains device-specific information (e.g.,
.IR dev/cdrom/info ).
--- /dev/null
+.\" Copyright (C) 1994, 1995, Daniel Quinlan <quinlan@yggdrasil.com>
+.\" Copyright (C) 2002-2008, 2017, Michael Kerrisk <mtk.manpages@gmail.com>
+.\" Copyright (C) , Andries Brouwer <aeb@cwi.nl>
+.\" Copyright (C) 2023, Alejandro Colomar <alx@kernel.org>
+.\"
+.\" SPDX-License-Identifier: GPL-3.0-or-later
+.\"
+.TH proc_sys_debug 5 (date) "Linux man-pages (unreleased)"
+.SH NAME
+/proc/sys/debug/ \- debug
+.SH DESCRIPTION
+.TP
+.I /proc/sys/debug/
+This directory may be empty.
+.SH SEE ALSO
+.BR proc (5),
+.BR proc_sys (5)