$NetBSD: patch-ac,v 1.6 2017/01/19 06:48:46 wen Exp $

Primitively roffify the doc so it can be installed as a man page.

--- bwbasic.doc.orig	2017-01-19 03:03:40.000000000 +0000
+++ bwbasic.doc
@@ -1,38 +1,10 @@
-
-               Bywater BASIC Interpreter, version 3.10
-               ---------------------------------------------
-
-                  Copyright (c) 1993, Ted A. Campbell
-                  for bwBASIC version 2.10, 11 October 1993
-
-                  Copyright (c) 2014-2015, Howatd Wulf, AF5NE
-                  for bwBASIC version 3.00, 12 May 2015
-
-                  Copyright (c) 2015-2016, Howatd Wulf, AF5NE
-                  for bwBASIC version 3.10, 27 July 2016
-
-
-CONTENTS:
-
-
-   1. DESCRIPTION
-   2. TERMS OF USE
-   3. QUICK REFERENCE LIST OF COMMANDS, FUNCTIONS AND OPERATORS
-   4. GENERAL NOTES ON USAGE
-   5. PREDEFINED VARIABLES
-   6. UNIMPLEMENTED COMMANDS AND FUNCTIONS
-      and AGENDA FOR DEVELOPMENT
-   7. THE STORY OF Bywater BASIC
-   8. COMMUNICATIONS
-   9. EXPANDED REFERENCE FOR COMMANDS, FUNCTIONS AND OPERATORS
-
-   The author wishes to express his thanks to Mr. David MacKenzie, 
-   who assisted in the development Unix installation and configuration
-   for this version.
-
-
-1. DESCRIPTION
-
+.Dd October 11, 1993
+.Dt bwBASIC 1
+.Os
+.Sh NAME
+.Nm bwBASIC
+.Nd BASIC Interpreter/Shell, version 2.10
+.Sh SYNOPSIS
 
    The Bywater BASIC Interpreter (bwBASIC) implements a large superset 
    of the ANSI Standard for Minimal BASIC (X3.60-1978) and a significant 
@@ -55,7 +27,7 @@ CONTENTS:
    lines as they are loaded.
 
 
-2. TERMS OF USE:
+.SH TERMS OF USE:
 
 
    This version of Bywater BASIC is released under the terms of the 
@@ -67,7 +39,7 @@ CONTENTS:
    for information on which you should contact the author.
 
 
-3. QUICK REFERENCE LIST OF COMMANDS, FUNCTIONS AND OPERATORS
+.SH QUICK REFERENCE LIST OF COMMANDS, FUNCTIONS AND OPERATORS
 
    
    The OPTION VERSION command selects a specific BASIC dialect.
@@ -630,7 +602,7 @@ CONTENTS:
       [LET] variable = expression
    
 
-4. GENERAL NOTES ON USAGE:
+.SH GENERAL NOTES ON USAGE:
 
 
    4.a. Interactive Environment
@@ -1564,7 +1536,7 @@ CONTENTS:
          Completed.
 
 
-5. PREDEFINED VARIABLES
+.SH PREDEFINED VARIABLES
 
 
    BWB.EDITOR$
@@ -1601,7 +1573,7 @@ CONTENTS:
    these keywords output nothing.     
 
    
-6. UNIMPLEMENTED COMMANDS AND FUNCTIONS, and AGENDA FOR DEVELOPMENT
+.SH UNIMPLEMENTED COMMANDS AND FUNCTIONS, and AGENDA FOR DEVELOPMENT
 
 
    There are some items not implemented that have been so long
@@ -1761,7 +1733,7 @@ CONTENTS:
    ZONEWIDTH
 
 
-7. THE STORY OF Bywater BASIC
+.SH THE STORY OF Bywater BASIC
 
 
    This program was originally begun in 1982 by my grandmother, Mrs.
@@ -1784,13 +1756,13 @@ CONTENTS:
    should know, though, that I myself am an historian, not a programmer.
 
 
-8. COMMUNICATIONS:
+.SH COMMUNICATIONS:
 
 
    email:  tcamp@delphi.com
 
 
-9. EXPANDED REFERENCE FOR COMMANDS, FUNCTIONS AND OPERATORS
+.SH EXPANDED REFERENCE FOR COMMANDS, FUNCTIONS AND OPERATORS
 
    
    bwBASIC provides a simple "HELP" command to assist you in