From 5f1cfa686748068fedb95d8dafda3dc7f999c948 Mon Sep 17 00:00:00 2001 From: Norbert Preining Date: Thu, 27 May 2021 03:01:40 +0000 Subject: CTAN sync 202105270301 --- info/digests/tex-implementors/036 | 540 -------------------------------------- 1 file changed, 540 deletions(-) delete mode 100644 info/digests/tex-implementors/036 (limited to 'info/digests/tex-implementors/036') diff --git a/info/digests/tex-implementors/036 b/info/digests/tex-implementors/036 deleted file mode 100644 index 1a9a31fa85..0000000000 --- a/info/digests/tex-implementors/036 +++ /dev/null @@ -1,540 +0,0 @@ -Date: 14 March 91 Message No: 036 - -To: TeX implementors and distributors - -From: Barbara Beeton - -Subject: Messages from DEK, part 1 - - -The latest package of marked-up messages from DEK was postmarked -15 January 92. It contained 10 checks, including two for actual bugs. -Unfortunately, other matters have conspired to delay my forwarding of -all this material, and I apologize. (I don't suppose anyone out there -would like to be a TUGboat production assistant? Or has lots of -experience in moving from one office to another with less shelf space -without losing track of anything? Didn't think so, somehow.) - -As some of you may know, DEK was awarded an honorary doctorate by the -Royal Institute of Technology in Stockholm last November. At that time, -some bug reports and other questions were apparently given to him in -person, and changes have been delayed as explained in this note which -accompanied the package: - - Barbara: Many thanks for this compilation! I will not however be - ready to update the sources until February because I mistakenly - put some things recd in Sweden into the wrong box and they are - currently being shipped via _sea_ _mail_. - I have gone through this material but will hold off updating the - master sources until I've gotten through some other things sent - to me in Stockholm from Poland, some of which may be extremely - important - -I have just finished checking the /tex area at labrea. There are no new -files in the errata directory, and as these are usually the first to be -installed, I assume that the main update has not yet been made. - - -######################################################################## - -Contents: - [ part 1 ] - >>> responses to DEK Sep 26 package - >>> DEK's alpha test, TeX 3.14a - >>> TeXbook errata - >>> inconsistent ligature/kerning behavior - >>> inconsistent expansion of \string, etc.; \newlinechar - >>> \halign + box assignment within displays - >>> positive/negative xn_over_d, tex.web section 107 - >>> DRF's "remaining comments" - >>> suggestion -- additional tracing facilities for \if* - >>> DEK's "local" change files, not at labrea - [ part 2 ] - >>> glue_ratio overflow - >>> \TeX logo; some problems with \loop - >>> cedilla accent macro in plain.tex - >>> missing \mathsurround in plain.tex - >>> \arrowvert code, plain.tex - >>> MF -- bugs or features? (also, some ACP errata) - >>> MFbook errata - >>> WEAVE -- Peter Breitenlohner - >>> WEAVE -- Brian {Hamilton Kelly} - [ sent separately ] - >>> Barry Smith, |history| variable in TeX.WEB - >>> Chris Rowley, two items: \fontdimen2 and marks - -************************************************************************ - ->>> responses to DEK Sep 26 package - -Date: Mon, 23 Dec 91 13:23:58 +0100 -From: Eberhard Mattes -Subject: Backenfisch, tex.web - -> [ dek: should i have used `backenfisch' instead? ] - -Maybe deleting `compound' on p. 96 would be better since I have found -no word with ck hyphenated k-k *because* it is a compound word. -(Of course there are words containing tt hyphenated tt-t *because* -they are compound words.) - - [ dek: - point well taken ... but I wasn't serious and i _did_ delete - `compound' in September as he requested - ] - --- - -In tex.web, there's a @^system dependencies@> missing for the line - [ dek: \S798 ] - -if n>max_quarterword then confusion("256 spans"); {this can happen, but won't} - ^^^ - This is system-dependent. - [ dek: $2.56 ] - -Yours, - Eberhard Mattes (mattes@azu.informatik.uni-stuttgart.de) - -<<< end responses to DEK Sep 26 package - -************************************************************************ - ->>> DEK's alpha test, TeX 3.14a - -Date: Tue 24 Sep 91 11:22:21-EST -From: bbeeton -To: cet1%phx.cam.ac.uk@nsfnet-relay.ac.uk, - tex%uk.ac.cranfield.rmcs@nsfnet-relay.ac.uk, pzf5hz@ruipc1e.Bitnet -Subject: message from dek -- tex alpha version 3.14a - -chris, brian, and frank, -you are hereby deputized to follow dek's instructions and test out -the new version. [ ... ] -i won't forward this information to anyone else [for at least two -weeks], and you probably should be discreet about it too. thanks. -cheers. -- bb - -------------------- -Date: Fri, 20 Sep 91 12:50:54 -0700 -Subject: note from Don - - [ copy of message from dek ] - ------- -Date: Thu, 26 SEP 91 22:31:01 BST -From: TEX@rmcs.cranfield.ac.uk -Reply-to: Brian {Hamilton Kelly} -Subject: RE: message from dek -- tex alpha version 3.14a - -In message <685725741.0.BNB@MATH.AMS.COM> -of Tue 24 Sep 91 11:22:21-EST, bbeeton wrote: - -> chris, brian, and frank, -> you are hereby deputized to follow dek's instructions ... -> ... (i will take care of the envelope of "comments and checks" - ^ - (Would I spell this cheques? :-) -> as soon as i can after i get back to providence.) - -Well, I've collected the new files (I *love* the README!!), modified my -change file to accommodate the new banner and a few of the -|slow_print|s, and built 3.14a. It's great!! Fixes my problem with -hyphenation vs. boundary ligatures perfectly. And what an elegant -solution: I'd expected the fix to be complicated, but it just requires -one simple global and the odd preservation of context. - -> Date: Fri, 20 Sep 91 12:50:54 -0700 -> Subject: note from Don -> -> Meanwhile, there's some more "immediate" news. I've prepared an -> alpha-test version of TeX, called version 3.14a. Before I release -> it officially, I'd like CET1 and Brian Hamilton-Kelly and maybe -> Frank Mittelbach [and anybody else you think best, but I don't really -> want this version to proliferate] to try it. There are two changes, -> one to cure the anomaly Frank noticed about \newlinechar acting -> differently wrt \write and \message [and other similar glitches I -> then noticed myself], the other to fix I hope the problem Brian was -> having with Greek. I'm reluctant to let the version number converge to -> \pi too quickly, so I would at least like to have Brian accumulate -> some experience with his Greek tests before putting this out widely. -> Of course anybody is free to use it at their own risk. - -Be warned, however, that so far I've only tested it against the input -that caused me problems back in April. I'll try to do some more -thorough testing in the near future. - - [ dek: - Certainly hope you did by now -- I need more reassurance than - a single test - ] - -> The files tex.web and tex82.bug have been moved to labrea.stanford.edu -> where they are accessible via anonymous ftp. After logging in, -> connect to directory alpha (which is for alpha-test software). -> I forgot to copy the trip test files; if they are desperately needed, -> I could bring them in from home. - -I haven't TRIPped the new TeX for this reason. The interesting thing -would be if TRIP were extended to check the new ligature/hyphenation -code: I expect that, with DEK's customary thoroughness, he'll have done -this, so look forward to applying the tests myself when 3.14a emerges as -3.141. - - [ dek: - Actually my customary thoroughness is becoming less customary - ] - -> So, next week you'll get my letter explaining all! Meanwhile, a -> lookahead: I'll be in Sweden during November and December (thanks to -> some good words from Roswitha, I'll getting an honorary degree -> there!), and I plan to make the next official update to TeX sources -> early in January. By then, this version 3.14a should be checked out, -> and I can release it as version 3.141. - -Whilst you're talking to DEK, barbara, what response did he give to that -d..d problem of Weave failing to wrap correctly when processing a TeX -comment? I have a horrible suspicion in my mind that he's already said -something to the effect that he edited it manually! Or am I imagining -that horror? My fix works very well and doesn't have any bugs that I -can see, so why doesn't he adopt it? - -Brian HK - ------- -Date: Sun, 29 Sep 91 00:56:57 BST -From: Chris Thompson -To: Barbara Beeton -Cc: Brian {Hamilton Kelly} , - Frank Mittelbach -Subject: Re: [message from dek -- tex alpha version 3.14a] - -Barbara, Brian, Frank, - - I have fetched and compiled TeX 3.14a. Unfortunately, change 397 -seems to have bugs. Try the following input: - - % TeX 3.14a test - \pretolerance=-1 - \ Respectively.\par - \showboxbreadth=255 \showboxdepth=255 \showlists - \bye - -and compare the log files for 3.14 and 3.14a. That for 3.14a has an -extra kern in between the "-ly" and the ".": - - .\tenrm e - .\tenrm l - .\tenrm y - .\kern-0.83334 \ This kern has been doubled by the - .\kern-0.83334 / automatic hyphentaion algorithm. - .\tenrm . - .\penalty 10000 - - [ dek: - well, this made me feel very sick, but I sure am thankful to - Chris for finding it. - $10.24 - ] - -I discovered this while checking that 'webman.tex' generated the same -DVI file (except for date stamp), which is part of my standard paranoia -suite. There were two discrepancies of the above type in the very first -paragraph... but the rest of the document produced no more! - - [ dek: - I think probably the _old_ 3.0 would also produce double kerns - in cases where kern was specified before right boundary character - by font designer [e.g. to kern after f at end of word] - - While studying this I found another mistake in my code from - September. But I think the basic idea was sound, only the - execution was faulty. - - Still I guess I should try another alpha test with "3.14b"? - ] - -Brian & Frank: can you confirm this effect? - -Chris Thompson -Cambridge University Computing Service -JANET: cet1@uk.ac.cam.phx -Internet: cet1@phx.cam.ac.uk - ------- -Date: Mon, 30 SEP 91 15:46:17 BST -Reply-to: Brian {Hamilton Kelly} -From: TEX@rmcs.cranfield.ac.uk -Subject: Re: [message from dek -- tex alpha version 3.14a] - -In message of Sun, 29 Sep 91 -00:56:57 BST, Chris Thompson wrote: - -> Barbara, Brian, Frank, -> -> I have fetched and compiled TeX 3.14a. Unfortunately, change 397 -> seems to have bugs. [ ... ] -> -> and compare the log files for 3.14 and 3.14a. That for 3.14a has an -> extra kern in between the "-ly" and the ".": -> -> .\tenrm e -> .\tenrm l -> .\tenrm y -> .\kern-0.83334 \ This kern has been doubled by the -> .\kern-0.83334 / automatic hyphentaion algorithm. -> .\tenrm . -> .\penalty 10000 -> -> [ ... ] -> -> Brian & Frank: can you confirm this effect? - -I have repeated Chris' experiment, and can confirm that 3.14a does -indeed double the kern. Oh dear... - -The odd thing is that I compared the outputs resulting from running -DVItype on the DVI outputs of my Greek test, and saw only the expected -change from medial sigma to terminal sigma (with relevant horizontal -positioning changes). But I may have missed other horizontal changes -due to this bug: I've thrown the printout away again by now, -unfortunately! - -Brian - -<<< end DEK's alpha test, TeX 3.14a - -************************************************************************ - ->>> TeXbook errata - -Date: Tue, 19 Nov 91 16:05:02 GMT -From: Chris Thompson -Subject: TeXbook p.178 bug report - - Here is another TeXbook bugette report by Robert Hunt. I suppose it is -right in theory, unless it comes under the "deliberate lie" clause. Anyway, -perhaps you would like to have someone else vet it: I am getting to the stage -with Robert's bug reports that I just wish he would shut up! He seems happy -with the latest p.377 fix, by the way. - - ----------------------------------------------------------------------- -REH10 15 Nov 1991 16.49 -Very minor mistake on p.178 of the TeXbook: it claims that using \phantom{...} -in a maths formula always produces the same spacing (vertical and horizontal) -as just {...}; but of course this isn't true as \phantom can't tell whether the -current maths style is cramped or not, so \phantom{U^2} will produce different -vertical spacing in cramped style compared with what {U^2} would produce. I -don't think this is particularly worth worrying about, but it's always annoyed -me that \mathchoice doesn't distinguish between (say) T and T'. - ----------------------------------------------------------------------- - - [ dek: - $2.56 - I'm going to put the apology on page 360 because the truth would - interfere with the exposition on p 178 - ] - -Chris Thompson - - ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ - -Date: Tue, 3 Dec 91 15:13:01 MST -From: Nelson H. F. Beebe -Subject: Possible bug in TeXbook, p.270 - -Last night, while studying to TeXbook to better understand TeX's rules -for when spaces are significant, I found what I believe is a small -error in the TeXbook. I checked errata files errata.one .. errata.six -without finding this error already logged. - -The TeXbook, p.270, gives BNF rules for the grammar of dimensions. ->From this grammar, one concludes from the rules (pulled from -texman.tex) - -\is[true]\alt - -\is - \alt - -\is\alt - -\is\alt - -\is|.|$_{12}$\alt|,|$_{12}$ - \alt - \alt - -that "123 truept" is illegal input, since no space may precede the -word true according to the grammar. - -Nevertheless, TeX the program happily accepts such space: - -This is TeX, C Version 3.14 -**\relax - -*\dimen0 = 12345 true pt - - [ dek: - see the \P on p 268 that begins `We shall use a special - convention for keywords'. _true_ is a keyword - ] - -*\showthe\dimen0 -> 12345.0pt. -<*> \showthe\dimen0 - -? - -I believe that TeX the program is correct, and is consistent with its -permitting optional space before non-true dimensions. - -This suggests that the TeXbook should have the rule - -\is - \alt - -changed to - -\is - \alt - -I'm assuming that AB|CDE is to be parsed as (AB)|(CDE) (the -conventional interpretation in BNF grammars), rather than A(B|C)DE; -the latter would not make sense here anyway. - -======================================================================== -Nelson H.F. Beebe -Center for Scientific Computing -Department of Mathematics -220 South Physics Building -University of Utah -Salt Lake City, UT 84112 -USA - Tel: (801) 581-5254 - FAX: (801) 581-4148 - Internet: beebe@math.utah.edu -======================================================================== - -<<< end TeXbook errata - -************************************************************************ - ->>> inconsistent ligature/kerning behavior - -Date: Wed, 25 Sep 91 13:13:55 +0200 -From: Bernd Raichle -Subject: Bug in TeX's ligature builder?! (No, it's documented.) - -In a letter to DEK in November 1989 (i.e., before TeX 3.0; appeared in -TeXhax 90, Issue 5) Frank Mittelbach summarized some requirements of a -new TeX version. For example, he mentioned manipulations of the -"Ligatures and kerning tables" and the need to "Reconsider paragraphs -after page-breaking". Other users had and have similar wishes and -requirements. - -But nobody mentioned a bug, or better --- because this "bug" is -documented in the TeXbook --- the inconsistent and (for the beginner) -mysterious behaviour when TeX builds ligatures and inserts kerning. - -Try the following in plain TeX and look at the output. I have used -the fl-ligature as an example. (TeX's behaviour for kerning between -two characters is exactly the same.) - - ------------------------------ CUT ------------------------------ -\hsize=5cm % linebreak for more than three words -\hyphenation{Au-flage}% for demonstration (correct german is Auf-la-ge) - -Auflage\par % (1) show `fl' ligature -Auf{}lage Auf\relax lage\par % (2) simple way to avoid the ligature - -\pretolerance=10000 % no second pass -Auf{}lage -Auf{}lage Auf{}lage Auf{}lage Auf{}lage\par % (3) no ligatures - -\pretolerance=-1 % force second pass -Auf{}lage % no(!) ligature, because there's no preceding glue -Auf{}lage Auf{}lage Auf{}lage Auf{}lage\par % (4) ligatures - -Auf{}lage % (5) no(!) ligature, there's no preceding glue -Auf\kern0pt lage % no lig, explicit kern -Auf\/lage % no lig, explicit kern -$\rm Auflage$ % example of ligature in math mode -$\rm Auf{}lage$ % no lig, in math mode -\hbox{Auf{}lage} % no lig, in packed hbox -Auf{}lage\vrule width0pt\ % no lig, followed by a rule node -Auf{}lage\kern0ptAuf{}lage % 1st ligature, 2nd no ligature -Auf{}lage\par % ligature -\bye - ------------------------------ CUT ------------------------------ - -Example (1) shows the normal fl ligature, in example (2) I suppress -the ligature with an empty group (see TeXbook, exercise 5.1 and -answer) or a \relax (both are non-character tokens). - -In example (3) I use empty groups to suppress the ligatures. The -same(!) input paragraph in example (4) contains ligatures. The only -and very important difference between (3) and (4) is the value of -\pretolerance. (Note that the first word in (4) has no fl-ligature!) - -Example (5) gives a quick overview of TeX's behaviour, when the same -word (= the same input!) is used in a different context. You can -think of other examples: hbox the word... and unhbox it. Try the same -with the ''-ligature (i.e. compare '' with '{}'), etc. - - -Very short explanation of this behaviour: when TeX is in hmode, -ligatures and kernings are build out of the (current input) token -list. Non-character tokens (like { or \relax) influence ligatures and -kerning. - -When TeX is in math mode or after hyphenation is done in the second -pass of the line_break algorithm, ligatures and kernings are build out -of the node list representing the current paragraph (or math list). -This node list doesn't contain representations for tokens like { or -\relax anymore. Because not all parts of the node list are tried for -hyphenation, not all of the supressed ligatures are reconstituted. - - -TeX has a powerful linebreak algorithm, a powerful hyphenation -capability and powerful ligature and kerning tables. -But the connection between them shows IMHO design bugs, if you want to -use them and expect the same output from the same input. - - [ dek: - This is unfortunate but known and I decided long ago that - the cure would be worse than the disease. - ] - -Comments, etc. ...?? (... are expected!!) - - -bernd - -PS: I have ideas how to make ligatures/kerning more consistent. - But the result, after the necessary changes (in a few places) - are applied, is a "TeX" which fails the Trip-Test. - - __________________________________________________________________________ - Bernd Raichle, Student der Universit"at Stuttgart | "Le langage est source - privat: Stettener Str. 73, D-W-7300 Esslingen | de malentendus" - email: raichle@azu.informatik.uni-stuttgart.de | (A. de Saint-Exupery) - -<<< end inconsistent ligature/kerning behavior - - -######################################################################## - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -% 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 036 ] - -- cgit v1.2.3