CWEB - release 4.2, 2021-02-25.

This second service release wraps up the major code overhaul
after CWEB 4.0.

Makefile

@@ -1,6 +1,6 @@
 # This file is part of CWEB.
 # It is distributed WITHOUT ANY WARRANTY, express or implied.
-# Version 4.1 --- February 2021
+# Version 4.2 --- February 2021
 
 # Copyright (C) 1987,1990,1993,2000 Silvio Levy and Donald E. Knuth
 
@@ -63,8 +63,10 @@ RM= /bin/rm
 CP= /bin/cp
 
 # uncomment the second line if you use pdftex to bypass .dvi files
+# uncomment the third line if you use xetex to bypass .dvi files
 PDFTEX = dvipdfm
 #PDFTEX = pdftex
+#PDFTEX = xetex
 
 ##########  You shouldn't have to change anything after this point #######
 
@@ -105,6 +107,7 @@ ALL =  common.w ctangle.w cweave.w prod.w \
 	case "$(PDFTEX)" in \
 	 dvipdfm ) tex "\let\pdf+ \input $*"; dvipdfm $* ;; \
 	 pdftex ) pdftex $* ;; \
+	 xetex ) xetex $* ;; \
 	esac
 
 all: ctangle cweave

README.md

@@ -1,4 +1,4 @@
-# cweb 4.1
+# cweb 4.2
 
 people have been accumulating several decades of experience with
 [cweb](http://www-cs-faculty.stanford.edu/~uno/cweb.html), and we know that
@@ -16,7 +16,7 @@ in fact, now to be found in this cweb development project.
 besides for further development, this ‘project’ is used as an – obviously
 incomplete – repository of original release versions of levy/knuth
 [cweb](http://www-cs-faculty.stanford.edu/~uno/cweb.html). you can either
-compile these sources directly or stick the recent version “cweb-4.1” into my
+compile these sources directly or stick the recent version “cweb-4.2” into my
 [cwebbin](https://github.com/ascherer/cwebbin), which introduces convenient
 extensions and prepares cweb for inclusion in the “tex live” distribution.
 

comm-mac.ch

@@ -4,9 +4,9 @@ No changes to CTANGLE or CWEAVE are needed.
 (Contributed 13 Oct 2000 by [email protected]; slightly edited by Don Knuth)
 
 @x in limbo, change the title page document to specify Mac version
-  \centerline{(Version 4.1)}
+  \centerline{(Version 4.2)}
 @y
-  \centerline{(Version 4.1 for MacOS)}
+  \centerline{(Version 4.2 for MacOS)}
 @z
 
 @x sections 23/24: Make input_ln accept \n, \r, \n\r, or \r\n as line endings

comm-ql.ch

@@ -10,24 +10,24 @@ ex <dev_>cc;'-v -h -c -=500000 -DCWEBINPUTS=flp2_ common_c'
 @x
 \def\v{\char'174} % vertical (|) in typewriter font
 
-\def\title{Common code for CTANGLE and CWEAVE (Version 4.1)}
+\def\title{Common code for CTANGLE and CWEAVE (Version 4.2)}
 \def\topofcontents{\null\vfill
   \centerline{\titlefont Common code for {\ttitlefont CTANGLE} and
     {\ttitlefont CWEAVE}}
   \vskip 15pt
-  \centerline{(Version 4.1)}
+  \centerline{(Version 4.2)}
   \vfill}
 \def\botofcontents{\vfill
 \noindent
 @y
 \def\v{\char'174} % vertical (|) in typewriter font
 
-\def\title{Common code for CTANGLE and CWEAVE (QL Version 4.1)}
+\def\title{Common code for CTANGLE and CWEAVE (QL Version 4.2)}
 \def\topofcontents{\null\vfill
   \centerline{\titlefont Common code for {\ttitlefont CTANGLE} and
     {\ttitlefont CWEAVE}}
   \vskip 15pt
-  \centerline{(Version 4.1)}
+  \centerline{(Version 4.2)}
   \vfill}
 \def\botofcontents{\vfill
 \noindent