I checked in some changes that caused config to barf on the file
src/sys/dev/isa/files.isa due to my misunderstanding how newline
continuation was supposed to work.  So sorry...

I've since fixed it.  Here is the fix:

cd src/usr.sbin/config
diff -c scan.l.orig scan.l

*** scan.l.orig	Mon Nov 11 18:52:28 1996
--- scan.l	Tue Nov 12 12:40:55 1996
***************
*** 1,5 ****
  %{
! /*	$NetBSD: scan.l,v 1.9 1996/11/11 23:54:18 gwr Exp $	*/
  
  /*
   * Copyright (c) 1992, 1993
--- 1,5 ----
  %{
! /*	$NetBSD: scan.l,v 1.10 1996/11/12 17:42:47 gwr Exp $	*/
  
  /*
   * Copyright (c) 1992, 1993
***************
*** 129,134 ****
--- 129,142 ----
  [1-9][0-9]* {
  		yylval.val = strtol(yytext, NULL, 10);
  		return NUMBER;
+ 	}
+ \n/[ \t] {
+ 		/*
+ 		 * Note: newline followed by whitespace is always a
+ 		 * continuation of the previous line, so do NOT
+ 		 * return a token in this case.
+ 		 */
+ 		yyline++;
  	}
  \n	{
  		yyline++;