efitable.8: Nits

+ tag spdx
+ uncapitalize beginning of Nd, these should not be capitalized
+ add bars to show that long options XOR short options
+ remove stray paragraph marker for linter complaints

usr.sbin/efitable/efitable.8

@@ -1,4 +1,6 @@
 .\"
+.\" SPDX-License-Identifier: BSD-2-Clause
+.\"
 .\" Copyright (c) 2021 3mdeb Embedded Systems Consulting <contact@3mdeb.com>
 .\"
 .\" Redistribution and use in source and binary forms, with or without
@@ -27,7 +29,7 @@
 .Os
 .Sh NAME
 .Nm efitable
-.Nd Dump UEFI tables
+.Nd dump UEFI tables
 .Sh SYNOPSIS
 .Nm
 .Op Fl u Ar uuid | Fl t Ar name
@@ -39,7 +41,7 @@ This program prints data from
 tables.
 .Pp
 The following options are available:
-.Bl -tag -width 20m
+.Bl -tag -width "-t name | --table name"
 .It Fl -libxo
 Generate output via
 .Xr libxo 3
@@ -47,7 +49,7 @@ in a selection of different human and machine readable formats.
 See
 .Xr xo_options 7
 for details on command line arguments.
-.It Fl t Ar name Fl -table Ar name
+.It Fl t Ar name | Fl -table Ar name
 Specify the name of the table to print.
 Currently supported tables:
 .Pp
@@ -59,10 +61,9 @@ EFI Memory Attributes Table
 .It Cm prop
 EFI Properties Table
 .El
-.It Fl u Ar uuid Fl -uuid Ar uuid
+.It Fl u Ar uuid | Fl -uuid Ar uuid
 Specify the UUID of the table to print.
 .El
-.Pp
 .Sh HISTORY
 The
 .Nm