path: root/info/digests/tex-implementors/message.28

Date:	  19 Mar 90				Message No:	028

To:	  TeX implementors and distributors

From:	  Barbara Beeton

Subject:  Updates to TeX.WEB, MF.WEB, GFtoDVI, et al.


New versions of TeX.WEB, MF.WEB and other updates have been installed
at labrea, as Dan Kolkowitz has reported.  For the benefit of those who
may not be able to ftp these files easily, this message contains some
of the more important details:

    New files at labrea since 3 January 91
    Changes to the errata list (ERRATA.SIX)
    Addenda to TeX82.BUG as of 13 March 91
    Addenda to MF84.BUG as of 13 March 91
    Differences between TeX.WEB 3.1 and 3.14 (as of 18 March 1991)
    Differences between TeX.WEB 3.0 and 3.1 (as of 21 September 1990)
    Differences between MF.WEB 2.0 and MF.WEB 2.7 (as of 13 March 1991)
    Cosmetic change, GFTODVI.WEB, ver 3.0

Differences in TeX.WEB are provided in two parts since the details of the
update from version 3.0 to 3.1 was never reported in one of these messages.
In fact, both TeX.WEB and MF.WEB have been updated twice, with only one
version change, since the previous update.  The most recent changes were,
as Don Knuth says in the prose at the top, only cosmetic; cosmetic changes
do not usually appear in the bug listings, but should generally be made to
the main WEB files anyhow in order to keep in synch.

This is the last time that it will be possible to provide the difference
listings in this form.  These difference listings were prepared with a
TOPS-20 utility, and the Math Society's DEC-20 is being unplugged and
de-installed tomorrow.  We now have a couple of Unix workstations, and
the Unix differencing utility seems to be the best replacement (as soon
as I learn how to use it).  Although the VAX/VMS DIFF utility does a good
job of identifying differences, it adds a line number to each difference
line, often resulting in lines of more than 80 characters in length; not
a robust format for sending in e-mail across random network gateways.

As usual, there have been a number of updates to this mailing list since
the last time I sent a message directly, so if everyone receiving this
message could please acknowledge it, that will help keep the list in
good shape.


########################################################################

New files at labrea.stanford.edu since 3 Jan 91

/tex:
-rw-r--r--  1 468      fsuser      52165 Mar 13 17:03 DIFFS.Mar91 
-rw-r--r--  1 468      fsuser          0 Mar 13 17:24 tex.log 

/tex/OLD.pre-Mar91: 
total 7
drwxr-xr-x  2 468      fsuser        512 Mar 13 17:14 cweb
drwxr-xr-x  2 468      fsuser        512 Mar 13 17:19 errata
drwxr-xr-x  6 468      fsuser        512 Mar 13 17:14 local
drwxr-xr-x  2 468      fsuser        512 Mar 13 17:18 mf
drwxr-xr-x  2 468      fsuser        512 Mar 13 17:16 mfware
drwxr-xr-x  2 468      fsuser        512 Mar 13 17:18 tex
drwxr-xr-x  2 468      fsuser        512 Mar 13 17:14 tugboat

/tex/bibtex:
-rw-rw-r--  1 weening  ftp         27577 Mar 15 15:45 btxmac.tex 

/tex/errata:
-rw-rw-rw-  1 468      fsuser      15838 Mar 15 21:40 errata.six 
-rw-r--r--  1 468      fsuser       2528 Mar 13 17:05 errata.tex 
-rw-r--r--  1 468      fsuser      79228 Mar 13 17:05 mf84.bug 
-rw-r--r--  1 468      fsuser     295236 Mar 13 17:05 tex82.bug 

/tex/latex:
-rw-rw-r--  1 root     ftp         15834 Jan 14 18:58 addendum.tex 
-r--r--r--  1 root     fsuser      40243 Feb  8 21:02 latex.bug 
-r--r--r--  1 root     fsuser     286412 Feb  8 21:02 latex.tex 
-r--r--r--  1 root     fsuser      48458 Feb  8 21:02 lplain.tex 
-r--r--r--  1 root     fsuser      48804 Feb  8 21:03 splain.tex 

/tex/local/cm:
-rw-rw-rw-  1 468      fsuser       3561 Mar 15 21:44 ccmic9.mf 
-rw-rw-rw-  1 468      fsuser        217 Mar 15 21:44 odigs.mf 

/tex/local/lib:
-rw-r--r--  1 468      fsuser       3133 Mar 13 17:08 art.mf 
-rw-rw-r--  1 468      fsuser      33699 Mar 13 17:09 gkpmac.tex 
-rw-r--r--  1 468      fsuser       1581 Mar 13 17:09 list.tex 
-rw-r--r--  1 468      fsuser       2179 Mar 13 17:09 llist.tex 
-rw-r--r--  1 468      fsuser        263 Mar 13 17:09 oneone.mf 
-rw-r--r--  1 468      fsuser       8240 Mar 13 17:09 picmac.tex 

/tex/local/mf:
-rw-r--r--  1 468      fsuser        691 Mar 13 17:09 plain.log 

/tex/local:/tex/local/mfware:
-rw-r--r--  1 468      fsuser      28547 Mar 13 17:10 gftodvi.ch 

/tex/local/tex:
-rw-r--r--  1 468      fsuser      53657 Mar 13 17:10 initex.ch 

/tex/mf:
-rw-r--r--  1 468      fsuser     916840 Mar 13 17:06 mf.web 
-rw-r--r--  1 468      fsuser     938679 Mar 13 17:06 mfbook.tex 
-rw-r--r--  1 468      fsuser      18238 Mar  5 23:56 trapman.tex 

/tex/mfware:
-rw-r--r--  1 468      fsuser     186545 Mar 13 17:06 gftodvi.web 

/tex/tex:
-rw-r--r--  1 468      fsuser    1025435 Mar 18 21:20 tex.web
-rw-r--r--  1 468      fsuser    1381907 Mar 13 17:07 texbook.tex 
-rw-r--r--  1 468      fsuser       2438 Mar 13 17:07 trip.fot 
-rw-r--r--  1 468      fsuser     182701 Mar 13 17:07 trip.log 
-rw-r--r--  1 468      fsuser      18025 Mar 13 17:07 trip.typ 
-rw-r--r--  1 468      fsuser      12930 Mar 13 17:08 tripin.log 

/tex/tugboat:
-rw-r--r--  1 468      fsuser      30903 Mar 11 19:44 guidepro.tex 
-rw-r--r--  1 468      fsuser      14810 Mar 11 19:44 ltugboat.sty 
-rw-r--r--  1 468      fsuser       3785 Mar 11 19:44 ltugproc.sty 
-rw-r--r--  1 468      fsuser      25567 Mar 11 19:44 tugboat.com 
-rw-r--r--  1 468      fsuser      66791 Mar 11 19:44 tugboat.sty 
-rw-r--r--  1 468      fsuser       8901 Mar 11 19:44 tugproc.sty 


########################################################################

Addenda to TeX82.BUG as of 13 March 91

-------------
Note: When making change 376, I forgot to delete the redundant
code in module 883, and I should also have changed the name of that
module. These cosmetic changes (and some changes to the comments)
were made in version 3.14; but TeX 3.14 is functionally
equivalent to TeX 3.1 and only a tiny bit faster.

-------------
393. The absolutely final change (to be made after my death)
@x module 2
@d banner=='This is TeX, Version 3.14' {printed when \TeX\ starts}
@y
@d banner=='This is TeX, Version $\pi$' {printed when \TeX\ starts}
@z
My last will and testament for TeX is that no further changes be made
under any circumstances. Improved systems should not be called simply `TeX';
that name, unqualified, should refer only to the program for which I have
taken personal responsibility.  -- Don Knuth


########################################################################

Addenda to MF84.BUG as of 13 March 91

-------------
557. The absolutely final change (to be made after my death)
@x module 2
@d banner=='This is METAFONT, Version 2.7' {printed when \MF\ starts}
@y
@d banner=='This is METAFONT, Version $e$' {printed when \MF\ starts}
@z
My last will and testament for METAFONT is that no further changes be made
under any circumstances. Improved systems should not be called simply
`METAFONT'; that name, unqualified, should refer only to the program for which
I have taken personal responsibility.  -- Don Knuth


########################################################################

Changes to the errata list (ERRATA.SIX)

[ This is NOT a difference list. ]

\def\rhead{Bugs in {\tensl Computers \& Typesetting, 1990}}

  ...

\noindent This is a list of all corrections made to {\sl Computers \&
Typesetting}, Volumes A,~C, and E\null, between 30 September 1989 (when
the revisions for \TeX\ Version 3.0 and \MF\ Version 2.0 were made) and
December 31, 1990.

  ...

\bugonpage A137, lines 2 and 3 from the bottom (11/9/90)

{\eightssi
\rightline{and you shouldn't even be reading this manual,}
\rightline{which is undoubtedly all English to you.}
}

\bugonpage A141, line 15 from the bottom (10/18/90)

\tenpoint\noindent
Thus if you type `|$1\over2$|' (in a text) you get $1\over2$, namely style
$S$ over style~$S'$;\cutpar

  ...

\bugonpage C11, replacement for second quotation at bottom of page (9/27/90)

\begingroup
  \eightpoint \let\tt=\ninett
  \baselineskip 10pt
  \parfillskip \z@
  \interlinepenalty 10000
  \leftskip \z@ plus 40pc minus \parindent
  \let\rm=\eightss \let\sl=\eightssi
  \everypar{\sl}
  \def\par{\ifhmode\/\endgraf\fi}\obeylines
To anyone who has lived in a modern American city (except Boston)
at least one of the underlying ideas of ^{Descartes}' analytic geometry
will seem ridiculously evident. Yet, as remarked,
it took mathematicians all of two thousand years
to arrive at this simple thing.
\author ERIC TEMPLE ^{BELL}, {\sl Mathematics: Queen and Servant of %
 Science\/} (1951) % p123

\endgroup

\bugonpage C262, lines 19--21 (11/9/90)

\ninepoint\noindent
for commonly occurring idioms.
For example, `{\bf stop} |"hello"|' displays `|hello|' on the terminal and waits
until \<return> is typed.
\beginlines
|def |^|upto|| = step 1 until enddef;  def |^|downto|| = step -1 until enddef;|
\endgroup

  ...

\bugonpage C329, line 325 (12/29/90)

\ninepoint\noindent
which can be used to specify a nonstandard file area
or directory name for the gray\cutpar

  ...

\bugonpage C347, left column (9/27/90)

\eightpoint\noindent
Bell, Eric Temple, 11.

\bugonpage C349, left column (9/27/90)

\eightpoint\noindent
Descartes, Ren\'e, 6, 11, 19.

\bugonpage C356, right column (9/27/90)

\eightpoint\noindent
[remove the entry for Rex Stout.]

\bugonpage C358, right column (9/27/90)

\eightpoint\noindent
[remove the entry for Nero Wolfe.]


########################################################################

Differences between TeX.WEB 3.1 and 3.14 (as of 18 March 1991)

;COMPARISON OF TX:<TEX>TEX-31.WEB.1 AND TX:<TEX.NEW>TEX-314.WEB.1
;OPTIONS ARE    /E /3

**** FILE TX:<TEX>TEX-31.WEB.1, 1-43 (2896)

% A reward of $327.68 will be paid to the first finder of any remaining bug,
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-42 (2894)
% Version 3.14 was a cosmetic change for new Volume B (February 1991).

% A reward of $327.68 will be paid to the first finder of any remaining bug,
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-183 (10169)
@d banner=='This is TeX, Version 3.1' {printed when \TeX\ starts}

@ Different \PASCAL s have slightly different conventions, and the present
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-184 (10241)
@d banner=='This is TeX, Version 3.14' {printed when \TeX\ starts}

@ Different \PASCAL s have slightly different conventions, and the present
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-1008 (48300)
(If the \PASCAL\ compiler does not support non-local |@!goto|, the
@^system dependencies@>
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-1009 (48373)
(If the \PASCAL\ compiler does not support non-local |@!goto|\unskip, the
@^system dependencies@>
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-4856 (215250)
  {that's |text(font_id_base+equiv(n))|}
end
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-4857 (215330)
  {that's |font_id_text(equiv(n))|}
end
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-8209 (361639)
  if (cur_cs=0)and@|
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-8210 (361714)
@^recursion@>
  if (cur_cs=0)and@|
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-9674 (418737)

@p procedure conditional;
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-9675 (418825)
@^recursion@>

@p procedure conditional;
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-14080 (611160)

The box returned by |clean_box| is ``clean'' in the
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-14082 (611263)
@^recursion@>

The box returned by |clean_box| is ``clean'' in the
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-14175 (615068)

The second pass eliminates all noads and inserts the correct glue and
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-14178 (615186)
@^recursion@>

The second pass eliminates all noads and inserts the correct glue and
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-14760 (639342)
  cur_style:=save_style; @<Set up the values...@>;
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-14765 (639477)
@^recursion@>
  cur_style:=save_style; @<Set up the values...@>;
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-15438 (669367)
but we clear |aux| to zero just to be tidy.

@p @t\4@>@<Declare the procedure called |init_span|@>@t@>@/
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-15444 (669517)
but we clear them to zero just to be tidy.

@p @t\4@>@<Declare the procedure called |init_span|@>@t@>@/
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-17263 (749496)
@<Destroy the |t| nodes following |q|, but save the last one if it is
  a necessary kern; make |r| point to the following node@>;
if post_break(q)<>null then @<Transplant the post-break list@>;
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-17269 (749645)
@<Destroy the |t| nodes following |q|, and
   make |r| point to the following node@>;
if post_break(q)<>null then @<Transplant the post-break list@>;
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-17277 (749957)
  if not is_char_node(s) then if next_break(cur_p)<>null then
    if cur_break(next_break(cur_p))=s then s:=r;
  r:=link(s); link(s):=null;
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-17283 (750062)
  r:=link(s); link(s):=null;
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-17624 (764945)
hyphen can be considerably more complex than that. For example, suppose that
\.{abcdef} is a word in a font for which the only ligatures are \.{b\!c},
\.{c\!d}, \.{d\!e}, and \.{e\!f}. If this word is to permit hyphenation
between \.b and \.c, the two patterns with and without hyphenation are
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-17628 (764937)
hyphen can be considerably more complex than that. Suppose
\.{abcdef} is a word in a font for which the only ligatures are \.{b\!c},
\.{c\!d}, \.{d\!e}, and \.{e\!f}. If this word permits hyphenation
between \.b and \.c, the two patterns with and without hyphenation are
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-19977 (866921)
hyphenation. Again we have an implied ``cursor`` between characters
|cur_l| and |cur_r|. The main difference is that the |lig_stack| can now
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-19981 (866890)
hyphenation. Again we have an implied ``cursor'' between characters
|cur_l| and |cur_r|. The main difference is that the |lig_stack| can now
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-21590 (929845)
begin get_token; {|get_x_token| would fail on \.{\\ifmmode}!}
if (cur_cmd=math_shift)and(mode>0) then @<Go into display math mode@>
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-21594 (929814)
begin get_token; {|get_x_token| would fail on \.{\\ifmmode}\thinspace!}
if (cur_cmd=math_shift)and(mode>0) then @<Go into display math mode@>
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-22413 (960656)
by making its width zero.

@<Squeeze the equation as much as possible...@>=
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-22417 (960635)
by causing its width to be zero.

@<Squeeze the equation as much as possible...@>=
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-23152 (987557)
|info(par_shape_ptr)| can hold any positive~|n| such |get_node(2*n+1)|
doesn't overflow the memory capacity.
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-23156 (987543)
|info(par_shape_ptr)| can hold any positive~|n| for which |get_node(2*n+1)|
doesn't overflow the memory capacity.
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-23239 (990682)
if scan_keyword("at") then @<Put the (positive) `at' size into |s|@>
@.at@>
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-23243 (990673)
if scan_keyword("at") then @<Put the \(p)(positive) `at' size into |s|@>
@.at@>
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-23254 (991149)
@ @<Put the (positive) `at' size into |s|@>=
begin scan_normal_dimen; s:=cur_val;
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-23258 (991144)
@ @<Put the \(p)(positive) `at' size into |s|@>=
begin scan_normal_dimen; s:=cur_val;
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-23484 (998722)
@<Change the case of the token in |p|, if a change is appropriate@>=
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-23487 (998719)
@^data structure assumptions@>

@<Change the case of the token in |p|, if a change is appropriate@>=
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-24036 (1017828)
init for k:=0 to 255 do trie_used[k]:=min_quarterword;@+tini
k:=256;
while j>0 do
  begin undump(0)(k-1)(k); undump(1)(j)(x);@+init trie_used[k]:=qi(x);@+tini
  j:=j-x; op_start[k]:=qo(j);
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-24041 (1017859)
init for k:=0 to 255 do trie_used[k]:=min_quarterword;@+tini@;@/
k:=256;
while j>0 do
  begin undump(0)(k-1)(k); undump(1)(j)(x);@+init trie_used[k]:=qi(x);@+tini@;@/
  j:=j-x; op_start[k]:=qo(j);
***************

**** FILE TX:<TEX>TEX-31.WEB.1, 1-24175 (1023526)

This program doesn't bother to close the input files that may still be open.
**** FILE TX:<TEX.NEW>TEX-314.WEB.1, 1-24179 (1023563)
@^recursion@>

This program doesn't bother to close the input files that may still be open.
***************


########################################################################

Differences between TeX.WEB 3.0 and 3.1 (as of 21 September 1990)

;COMPARISON OF TX:<BNB>TEX-30.WEB.1 AND TX:<BNB>TEX-31.WEB.1
;OPTIONS ARE    /E /3

**** FILE TX:<BNB>TEX-30.WEB.1, 1-42 (2816)

% A reward of $327.68 will be paid to the first finder of any remaining bug,
**** FILE TX:<BNB>TEX-31.WEB.1, 1-41 (2814)
% Version 3.1 fixed nullfont, disabled \write{\the\prevgraf} (September 1990).

% A reward of $327.68 will be paid to the first finder of any remaining bug,
***************

**** FILE TX:<BNB>TEX-30.WEB.1, 1-68 (4055)
\def\drop{\kern-.1667em\lower.5ex\hbox{E}\kern-.125em} % middle of TeX
\catcode`E=13 \uppercase{\def E{e}}
\def\\#1{\hbox{\let E=\drop\it#1\/\kern.05em}} % italic type for identifiers

\outer\def\N#1. \[#2]#3.{\MN#1.\vfil\eject % begin starred section
**** FILE TX:<BNB>TEX-31.WEB.1, 1-69 (4135)

\outer\def\N#1. \[#2]#3.{\MN#1.\vfil\eject % begin starred section
***************

**** FILE TX:<BNB>TEX-30.WEB.1, 1-186 (10278)
@d banner=='This is TeX, Version 3.0' {printed when \TeX\ starts}

@ Different \PASCAL s have slightly different conventions, and the present
**** FILE TX:<BNB>TEX-31.WEB.1, 1-183 (10169)
@d banner=='This is TeX, Version 3.1' {printed when \TeX\ starts}

@ Different \PASCAL s have slightly different conventions, and the present
***************

**** FILE TX:<BNB>TEX-30.WEB.1, 1-8472 (372855)
begin nest[nest_ptr]:=cur_list; p:=nest_ptr;
while abs(nest[p].mode_field)<>vmode do decr(p);
scanned_result(nest[p].pg_field)(int_val);
end

@ @<Fetch the |par_shape| size@>=
**** FILE TX:<BNB>TEX-31.WEB.1, 1-8469 (372746)
if mode=0 then scanned_result(0)(int_val) {|prev_graf=0| within \.{\\write}}
else begin nest[nest_ptr]:=cur_list; p:=nest_ptr;
  while abs(nest[p].mode_field)<>vmode do decr(p);
  scanned_result(nest[p].pg_field)(int_val);
  end

@ @<Fetch the |par_shape| size@>=
***************

**** FILE TX:<BNB>TEX-30.WEB.1, 1-10358 (446031)
begin if input_ln(cur_file,false) then do_nothing;
firm_up_the_line;
**** FILE TX:<BNB>TEX-31.WEB.1, 1-10356 (446011)
begin line:=1;
if input_ln(cur_file,false) then do_nothing;
firm_up_the_line;
***************

**** FILE TX:<BNB>TEX-30.WEB.1, 1-10362 (446183)
first:=limit+1; loc:=start; line:=1;
end
**** FILE TX:<BNB>TEX-31.WEB.1, 1-10361 (446173)
first:=limit+1; loc:=start;
end
***************

**** FILE TX:<BNB>TEX-30.WEB.1, 1-10737 (464779)
font_bc[null_font]:=1; font_ec[null_font]:=0;
**** FILE TX:<BNB>TEX-31.WEB.1, 1-10736 (464760)
bchar_label[null_font]:=non_address;
font_bchar[null_font]:=non_char; font_false_bchar[null_font]:=non_char;
font_bc[null_font]:=1; font_ec[null_font]:=0;
***************

**** FILE TX:<BNB>TEX-30.WEB.1, 1-11673 (506824)
if at all. Like |nop| commands and \\{xxx} commands, font definitions can
appear before the first |bop|, or between an |eop| and a |bop|.
**** FILE TX:<BNB>TEX-31.WEB.1, 1-11674 (506916)
if at all. Like |nop| commands, font definitions can
appear before the first |bop|, or between an |eop| and a |bop|.
***************

**** FILE TX:<BNB>TEX-30.WEB.1, 1-18295 (794479)
is |trie_op_ptr|. If the table overflows, the excess ops are ignored.
Statistics printed during a dump make it possible for users to tell
if this has happened.

@<Glob...@>=
**** FILE TX:<BNB>TEX-31.WEB.1, 1-18296 (794550)
is |trie_op_ptr|.

@<Glob...@>=
***************

**** FILE TX:<BNB>TEX-30.WEB.1, 1-24730 (1045367)
  {disable \.{\\prevdepth}, \.{\\spacefactor}, \.{\\lastskip}}
cur_cs:=write_loc; q:=scan_toks(false,true); {expand macros, etc.}
**** FILE TX:<BNB>TEX-31.WEB.1, 1-24729 (1045294)
  {disable \.{\\prevdepth}, \.{\\spacefactor}, \.{\\lastskip}, \.{\\prevgraf}}
cur_cs:=write_loc; q:=scan_toks(false,true); {expand macros, etc.}
***************


########################################################################

Differences between MF.WEB 2.0 and MF.WEB 2.7 (as of 13 March 1991)

;COMPARISON OF TX:<TEX.MF>MF-20.WEB.1 AND TX:<TEX.NEW>MF-27.WEB.1
;OPTIONS ARE    /E /3

**** FILE TX:<TEX.MF>MF-20.WEB.1, 1-22 (1390)
% A few "harmless" optimizations have been made without changing versions.

% A reward of $81.92 will be paid to the first finder of any remaining bug,
% except bugs introduced after August 1989.
**** FILE TX:<TEX.NEW>MF-27.WEB.1, 1-22 (1390)
% Version 2.7 made consistent with TeX version 3.1 (September 1990).
% A few "harmless" optimizations have been made without changing versions.

% A reward of $163.84 will be paid to the first finder of any remaining bug,
% except bugs introduced after August 1989.
***************

**** FILE TX:<TEX.MF>MF-20.WEB.1, 1-153 (8073)
@d banner=='This is METAFONT, Version 2.0' {printed when \MF\ starts}

@ Different \PASCAL s have slightly different conventions, and the present
**** FILE TX:<TEX.NEW>MF-27.WEB.1, 1-154 (8144)
@d banner=='This is METAFONT, Version 2.7' {printed when \MF\ starts}

@ Different \PASCAL s have slightly different conventions, and the present
***************

**** FILE TX:<TEX.MF>MF-20.WEB.1, 1-2995 (123730)
fractions. Using the recurrence $x_n=(x_{n-55}-x_{n-31})\bmod 2^{28}$,
we generate batches of 55 new $x_n$'s at a time by calling |new_randoms|.
**** FILE TX:<TEX.NEW>MF-27.WEB.1, 1-2996 (123801)
fractions. Using the recurrence $x_n=(x_{n-55}-x_{n-24})\bmod 2^{28}$,
we generate batches of 55 new $x_n$'s at a time by calling |new_randoms|.
***************

**** FILE TX:<TEX.MF>MF-20.WEB.1, 1-3005 (124184)
and then it will fetch |randoms[j_random]|.

@d next_random==if j_random=0 then new_randoms
**** FILE TX:<TEX.NEW>MF-27.WEB.1, 1-3006 (124255)
and then it will fetch |randoms[j_random]|. The |next_random| macro
actually accesses the numbers backwards; blocks of 55~$x$'s are
essentially being ``flipped.'' But that doesn't make them less random.

@d next_random==if j_random=0 then new_randoms
***************

**** FILE TX:<TEX.MF>MF-20.WEB.1, 1-11094 (468472)
numerators and denominators is to generalize the Stern-Peirce tree
[cf.~{\sl The Art of Computer Programming\/ \bf2}, exercise 4.5.3--40]
@^Peirce, Charles Santiago Sanders@>
@^Stern, Moriz Abraham@>
to a ``Stern-Peirce wreath'' as follows: Begin with four nodes
arranged in a circle, containing the respective directions
**** FILE TX:<TEX.NEW>MF-27.WEB.1, 1-11097 (468704)
numerators and denominators is to generalize the Stern-Brocot tree
[cf.~{\sl Concrete Mathematics}, section 4.5]
@^Brocot, Achille@>
@^Stern, Moriz Abraham@>
to a ``Stern-Brocot wreath'' as follows: Begin with four nodes
arranged in a circle, containing the respective directions
***************

**** FILE TX:<TEX.MF>MF-20.WEB.1, 1-15894 (663124)
  pack_file_name(cur_name,MF_area,cur_ext);
  if a_open_in(cur_file) then goto done;
  end_file_reading; {remove the level that didn't work}
**** FILE TX:<TEX.NEW>MF-27.WEB.1, 1-15897 (663314)
  if cur_area="" then
    begin pack_file_name(cur_name,MF_area,cur_ext);
    if a_open_in(cur_file) then goto done;
    end;
  end_file_reading; {remove the level that didn't work}
***************

**** FILE TX:<TEX.MF>MF-20.WEB.1, 1-15919 (664150)
begin if not input_ln(cur_file,false) then do_nothing;
firm_up_the_line;
buffer[limit]:="%"; first:=limit+1; loc:=start; line:=1;
end
**** FILE TX:<TEX.NEW>MF-27.WEB.1, 1-15924 (664383)
begin line:=1;
if input_ln(cur_file,false) then do_nothing;
firm_up_the_line;
buffer[limit]:="%"; first:=limit+1; loc:=start;
end
***************


########################################################################

Cosmetic change, GFTODVI.WEB, ver 3.0

;COMPARISON OF TX:<TEX.MFWARE>GFTODVI.WEB AND TX:<TEX.NEW>GFTODVI.WEB.1
;OPTIONS ARE    /3

**** FILE TX:<TEX.MFWARE>GFTODVI.WEB, 1-2553 (117187)
if a |"/"| was removed at the end of the file name; this user that the
user will have a chance to issue special instructions online just before
**** FILE TX:<TEX.NEW>GFTODVI.WEB, 1-2553 (117187)
if a |"/"| was removed at the end of the file name; this means that the
user will have a chance to issue special instructions online just before
***************


########################################################################

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%  Character code reference
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%                       Upper case letters: ABCDEFGHIJKLMNOPQRSTUVWXYZ
%                       Lower case letters: abcdefghijklmnopqrstuvwxyz
%                                   Digits: 0123456789
% Square, curly, angle braces, parentheses: [] {} <> ()
%           Backslash, slash, vertical bar: \ / |
%                              Punctuation: . ? ! , : ;
%          Underscore, hyphen, equals sign: _ - =
%                Quotes--right left double: ' ` "
%"at", "number" "dollar", "percent", "and": @ # $ % &
%           "hat", "star", "plus", "tilde": ^ * + ~
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

[ end of message 028 ]
-------