fix trivial nroff source bug, per PR 8724

usr.bin/mail/mail.1

@@ -1,4 +1,4 @@
-.\"	$NetBSD: mail.1,v 1.14 1999/03/22 18:16:39 garbled Exp $
+.\"	$NetBSD: mail.1,v 1.15 1999/12/20 22:53:44 fair Exp $
 .\"
 .\" Copyright (c) 1980, 1990, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -450,7 +450,6 @@ argument is given, the previous 18\-message group is printed.
 .It Ic help
 A synonym for
 .Ic \&?
-.ne li
 .It Ic hold
 .Pf ( Ic ho ,
 also
@@ -731,7 +730,7 @@ Message headers currently being ignored (by the
 or
 .Ic retain
 command) are not included.
-.ne li
+.sp
 .It Ic \&~F Ns Ar messages
 Identical to
 .Ic \&~f ,
@@ -831,7 +830,7 @@ Causes
 to prompt you for the subject of each message you send.
 If
 you respond with simply a newline, no subject field will be sent.
-.ne li
+.sp
 .It Ar askcc
 Causes you to be prompted for additional carbon copy recipients at the
 end of each message.
@@ -978,7 +977,7 @@ Pathname of the text editor to use in the
 command and
 .Ic \&~v
 escape.
-.ne li
+.sp
 .It Va crt
 The valued option
 .Va crt