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-% Bugs (sigh) in Computers \& Typesetting --- the most recent errata
-
-\tracingpages=1
-\input manmac
-\def\.#1{\hbox{\tt#1}}
-\font\sltt=cmsltt10
-\font\niness=cmss9
-\font\ninessi=cmssi9
-\proofmodefalse
-\raggedbottom
-\output{\hsize=29pc \onepageout{\unvbox255\kern-\dimen@ \vfil}}
-
-\def\today{\number\day\
- \ifcase\month\or
- Jan\or Feb\or Mar\or Apr\or May\or Jun\or
- Jul\or Aug\or Sep\or Oct\or Nov\or Dec\fi
- \ \number\year}
-
-\def\cutpar{{\parfillskip=0pt\endgraf}}
-
-\def\rhead{Bugs in {\tensl Computers \& Typesetting as of \today}}
-\def\bugonpage#1(#2) \par{\bigbreak\tenpoint
- \hrule width\hsize
- \line{\lower3.5pt\vbox to13pt{}Page #1\hfil(#2)}\hrule width\hsize
- \nobreak\medskip}
-\def\buginvol#1(#2) \par{\bigbreak\penalty-1000\tenpoint
- \hrule width\hsize
- \line{\lower3.5pt\vbox to13pt{}Volume #1\hfil(#2)}\hrule width\hsize
- \nobreak\medskip}
-\def\slMF{{\manual 89:;}\-{\manual <=>:}} % slant the logo
-\def\0{\raise.7ex\hbox{$\scriptstyle\#$}}
-\newcount\nn
-\newdimen\nsize \newdimen\msize \newdimen\ninept \ninept=9pt
-\newbox\eqbox \setbox\eqbox=\hbox{\kern2pt\eightrm=\kern2pt}
-
-\tenpoint
-\noindent This is a list of all substantial corrections made to {\sl Computers
-\& Typesetting\/} since the beginning of 2014.
-(More precisely, it lists errors corrected
-since the 19th printing of Volume~A, the 9th printing
-of Volume~B, the 8th printing of Volume~C, the 6th printing of Volume~D,
-and the 7th printing of Volume~E. % 2012 for A-D, 2013 for E
-But it omits changes that are ``purely cosmetic.'')
-Corrections made to the softcover version of {\sl The \TeX book\/},
-beginning with its 32nd printing, are
-the same as corrections to Volume~A\null. Corrections to the softcover
-version of {\sl The \slMF\kern1ptbook}, beginning with its 11th printing,
-are the same as corrections to Volume~C\null. Changes to the mini-indexes
-and master indexes of Volumes B, D, and~E are not shown here unless they are
-not obviously derivable from what has been shown. Some (or all) of these
-errors have been corrected in the most recent printings.
-\looseness=-1
-
- % volume A
-
-\bugonpage A34, line 3 from the bottom (01/09/20)
-
-\ninepoint\noindent
-not, you can say
-`\.{I\char`\\errorcontextlines=100} \.{\char`\\oops}' and try again. \ (That
-will usually\cutpar
-
-\bugonpage A43, line 6 (07/24/14)
-
-\tenpoint\noindent
-keyboard, or that have been
-pre\"empted for formatting?
-
-\bugonpage A49, cummings quote (08/03/19)
-
-(delete the period at the end of the line)
-
-\bugonpage A66, line 3 from the bottom (08/26/17)
-
-\ninepoint
-Such displays of box contents will be discussed further in
-Chapters 12 and~27.\cutpar
-
-\bugonpage A105, lines 9--16 (01/16/21)
-
-\ddanger If you say \.{\char`\\vadjust\char`\{}$\langle\,$vertical
-mode material$\,\rangle$\.{\char`\}} within a
-paragraph, \TeX\ will use internal vertical mode to insert the specified
-material into the vertical
-list that encloses the paragraph, immediately after whatever line
-contained the position of the \.{\char`\\vadjust}. For example, you can say
-`\.{\char`\\vadjust\char`\{\char`\\kern1pt\char`\}}'
-to increase the amount of space between lines of a
-paragraph if those lines would otherwise come out too close together. \ (The
-\vadjust{\kern1pt}author
-did that in the current line, just to illustrate what happens.) \ Also,
-if you want to make sure that a page break will occur immediately after a
-certain line, you can say `\.{\char`\\vadjust\char`\{\char`\\eject\char`\}}'
-anywhere in that line.
-
-\bugonpage A122, lines 3--8 (11/24/19)
-
-\ninepoint\noindent
-\.{\char`\\count255}, \.{\char`\\dimen255}, \.{\char`\\skip255},
-\.{\char`\\muskip255}, and \.{\char`\\toks255} are
-traditionally kept available for such purposes. Furthermore, plain \TeX\
-reserves \.{\char`\\dimen0} to \.{\char`\\dimen9},
-\.{\char`\\skip0} to \.{\char`\\skip9}, \.{\char`\\muskip0} to
-\.{\char`\\muskip9}, and \.{\char`\\box0} to \.{\char`\\box9}
-for ``scratchwork''; these registers
-are never allocated by the \.{\char`\\new...}\null\ operations. We have seen that
-\.{\char`\\count0} through \.{\char`\\count9} are special,
-and \.{\char`\\box255} also turns out to
-be special; so those registers should be avoided unless you know what you
-are doing.
-
-\bugonpage A155, line 8 from the bottom (01/17/21)
-
-\ninepoint\indent
-\.{\char`\\mathopen\char`\{\char`\\hbox\char`\{\char`\$\char`\\left\char`\#1}%
-$\langle\,$strut$\,\rangle$\.{\char`\\right.\char`\$\char`\}\char`\}}
-
-\bugonpage A155, the bottom six lines (12/10/18)
-
-\ninepoint\noindent
-dividual symbols; \.{\char`\\left}$\,\ldots\,$\.{\char`\\right}
-constructions are treated as ``inner'' subformulas, which means that
-they will be surrounded by additional space in certain circumstances.
-All other subformulas are generally treated as ordinary symbols,
-whether they are formed by \.{\char`\\overline} or
-\.{\char`\\hbox} or \.{\char`\\vcenter} or
-by simply being enclosed in braces. Thus, \.{\char`\\mathord} isn't really
-a necessary part of the \TeX\ language; instead of typing
-`\.{\char`\$1\char`\\mathord,234\char`\$}' you can get the same
-effect from `\.{\char`\$1\char`\{,\char`\}234\char`\$}'.
-
-\bugonpage A158, line 19 (12/10/18)
-
-\ninepoint\indent
-Inner\quad is an inner atom produced by
- `\.{\char`\\left}$\,\ldots\,$\.{\char`\\right}';
-
-\bugonpage A170, lines 18 and 19 (12/10/18)
-
-\ninepoint\noindent
-subformulas delimited by \.{\char`\\left} and \.{\char`\\right}
-are treated as type~Inner. The following table is
-used to determine the spacing between pairs of adjacent atoms:
-
-\bugonpage A171, line 19 from the bottom (06/15/19)
-
-\ninepoint\noindent
-formula produces a result essentially equivalent to
-`\.{\char`\\left(}$\langle\,$subformula$\,\rangle$\.{\char`\\right)}',
-when\cutpar
-
-\bugonpage A215, line 16 from the bottom becomes two lines (10/13/20)
-
-\ninepoint
-\item\bull Just after a token such as \.{\char`\$}$_3$
-that begins math mode, to see if
-another token of category 3 follows.
-
-\bugonpage A222, lines 21--23 (01/16/21)
-
-\ninepoint
-\halign{\indent#\hfil&\quad(see Chapter #)\hfil\cr
-\.{\char`\\hbox}$\langle\,$box specification$\,\rangle$%
- \.{\char`\{}$\langle\,$horizontal mode material$\,\rangle$\.{\char`\}}&12\cr
-\.{\char`\\vbox}$\langle\,$box specification$\,\rangle$%
- \.{\char`\{}$\langle\,$vertical mode material$\,\rangle$\.{\char`\}}&12\cr
-\.{\char`\\vtop}$\langle\,$box specification$\,\rangle$%
- \.{\char`\{}$\langle\,$vertical mode material$\,\rangle$\.{\char`\}}&12\cr
-}
-
-\bugonpage A222, lines 11--13 from the bottom (01/16/21)
-
-\ninepoint\noindent
-ter~15. The \.{\char`\\vsplit} operation
-is also explained in Chapter~15. In math modes an additional
-type of box is available:
-\.{\char`\\vcenter}$\langle\,$box specification$\,\rangle$%
- \.{\char`\{}$\langle\,$vertical mode material$\,\rangle$\.{\char`\}}
-(see Chapter~17).
-
-\bugonpage A232, line 14 (01/10/21)
-
-\ninepoint\noindent
-tabs outside; `\.{\char`\\global\char`\\settabs}' will not do what
-you might think it should.
-
-\bugonpage A233, lines 3--5 (04/27/15)
-
-\tenpoint\noindent
-Only two tabs are set in this case, because only two \.{\char`\&}'s
-appear in the sample line. \ (A sample line usually
-ends with~\.{\char`\&\char`\\cr}, as it does here,
-because text material between the last tab and \.{\char`\\cr}
-isn't used for anything.)
-
-\bugonpage A252, lines 5--7 (12/25/20)
-
-\ninepoint\noindent
-blank, and
-the footline is normally a centered page number, but you can specify any
-headline and footline that you want by changing the token lists
-\.{\char`\\headline} and \.{\char`\\footline}. For example,
-
-\bugonpage A253, lines 7--9 from the bottom (10/27/20)
-
-\ninepoint\indent
-\.{\char`\\everypar} or \.{\char`\\errhelp}, except that \TeX\
-retains the begin-group symbol~`\.{\char`\{}' at the beginning
-and the end-group symbol~`\.{\char`\}}' at the end. These
-grouping characters
-help to keep the output routine from interfering with what
-\TeX\ was doing\cutpar
-
-\bugonpage A256, line 19 (08/28/15)
-
-\ninepoint\indent
-\tt \char`\\baselineskip=24pt \char`\\lineskiplimit=0pt
-
-\bugonpage A277, lines 9 and 10 from the bottom (08/26/17)
-
-\ninepoint\indent
-$\langle\,$hyphenation assignment$\,\rangle$\is
- \.{\char`\\hyphenation}$\langle\,$filler$\,\rangle$%
- \.{\char`\{}$\langle\,$hyphenations$\,\rangle$\.{\char`\}}\par
-\qquad \alt \.{\char`\\patterns}$\langle\,$filler$\,\rangle$%
- \.{\char`\{}$\langle\,$patterns$\,\rangle$\.{\char`\}}
-
-\bugonpage A286, bottom two lines {(and affecting the top lines
-of page 287)} (08/26/17)
-
-\ninepoint\noindent
-stands for zero or more \<assignment>
-commands other than \.{\char`\\setbox}, possibly with \<filler>.
-If the assignments are not followed by a \<character>, where
-\<character> stands\cutpar
-
-\bugonpage A287, lines 11--17 (04/22/20)
-
-\ninepoint
-\textindent{$\bull$} \.{\char`\\discretionary}%
- \<disc text>\<disc text>\<disc text>.\enskip
-A \<disc text> has the form
-`\<filler>\.{\char`\{}\<horizontal mode material>\.{\char`\}}',
-where the material is processed in restricted horizontal mode and
-should contain only fixed-width things.
-More precisely, the horizontal list formed by each
-\<disc text> must consist only of characters, ligatures,
-kerns, boxes, and rules; there should be no glue or penalty items, etc.
-This command appends a discretionary item to the current list; see
-Chapter~14 for the meaning of a discretionary item. The space factor is
-not changed.
-
-\bugonpage A292, lines 8--10 (04/22/20)
-
-\ninepoint
-\textindent{$\bull$} \.{\char`\\discretionary}%
- \<disc text>\<disc text>\<disc text>.\enskip
-This command has the same effect as in horizontal mode (see Chapter~25), but the
-third \<disc text> must produce an empty list.
-
-\bugonpage A299, line 11 from the bottom (11/01/20)
-
-\ninepoint\noindent
-is corrupted or was prepared for a different version of \TeX.
-
-\bugonpage A305, bottom line (06/30/20)
-
-\ninepoint\indent
-\tt \char`\\setbox0=\char`\\hbox\char`\{\char`\#1\char`\}%
-\char`\\advance\char`\\dimen0 by -\char`\\wd0 \char`\}\rm.
-
-\bugonpage A309, line 2 becomes two lines (12/06/20)
-
-\ninepoint\noindent
-represent text entered from the user's terminal, or with
-`\.{<insert>}', when they
-represent text inserted during error recovery).
-
-\bugonpage A316, lines 17 and 18 from the bottom (09/03/15)
-
-\ninepoint\noindent
-(The next line must also not be too tall.)
-Here \.{\char`\\specialstar} is a box of height zero and depth
-\.{\char`\\strutdepth},
-and it puts an asterisk in the left margin:
-
-\bugonpage A320, lines 5--9 from the bottom (06/27/15)
-
-\ninepoint\noindent
-{\bf 17.21.}\enspace Assigning \.{\char`\\delcode\char`\`\char`\{}
-would not work to allow `\.{\char`\\left\char`\{}', because
-the brace has category~1 and isn't a legal \<delim>.
-Allowing brace delimiters would be a bad idea because it would
-mess up other constructions, such as arguments to macros, and
-components of alignments. Moreover, a user who
-gets away with `\.{\char`\\left\char`\{}'
-is likely to try also `\.{\char`\\bigl\char`\{}', which
-fails miserably.
-
-\bugonpage A326, line 12 (08/26/17)
-
-\ninepoint\noindent
-its natural width. The \.{\char`\\hbox} version also invokes
-\.{\char`\\everyhbox} and \.{\char`\\everymath}.
-
-\bugonpage A329, line 3 of answer 20.7 (05/15/19)
-
-\ninepoint\noindent
-the three tokens \.{!1}, \.{\char`\#2}, \.{[}$_1$; the
-\<replacement text> consists of the six tokens
-\.{\char`\{}$_1$, \.{\char`\#}$_6$,\cutpar
-
-\bugonpage A329, line 6 of answer 20.7 (05/15/19)
-
-\ninepoint\noindent
-is otherwise irrelevant. Thus, `\.{\char`\\def\char`\\!!1\char`\#2\char
- `\#[\char`\{\char`\#\char`\#]!!\char`\#2]}'
-would produce an essentially\cutpar
-
-\bugonpage A329, line 5 from the bottom of answer 20.7 (05/15/19)
-
-\ninepoint\indent
-\.{!1<-x}
-
-\bugonpage A329, bottom line of answer 20.7 (05/15/19)
-
-\ninepoint\noindent
-final parameter in the parameter text;
-`\.{!1}' would have been rendered `\.{\char`\#1}'.
-
-\bugonpage A332, lines 13 and 14 (08/26/17)
-
-\ninepoint\noindent
-{\bf 21.10.}\enspace If you say
-`\.{\char`\{\char`\\let}\stretch
-\.{\char`\\the=0\char`\\edef}\stretch
-\.{\char`\\next}\stretch
-\.{\char`\{\char`\\write}\stretch
-\.{\char`\\cont}\stretch
-\.{\char`\{}\<token list>\.{\char`\}\char`\}\char`\\next}\stretch
-\.{\char`\}}',
-the \.{\char`\\write} will be exercuted after
-\.{\char`\\edef} expands everything except \.{\char`\\the}.
-
-\bugonpage A332, bottom line (11/15/19)
-
-\ninepoint\indent\quad
-\tt \char`\\+\char`\&\char`\{\char`\\bf end\char`\};\char`\\cr \
- \char`\%\ note that the semicolon isn't bold
-
-\bugonpage A342, lines 12 and 13 (08/14/20)
-
-\tenpoint\noindent
-of plain \TeX\ format; but some of them are primitive (built in),
-such as `\.{\char`\\par}' (end of
-paragraph), `\.{\char`\\noindent}' (beginning of
-non-indented paragraph), and `\.{\char`\/}' (italic\cutpar
-
-\bugonpage A345, lines 10--13 from the bottom (06/27/15)
-
-\ninepoint\noindent
-Braces are used for grouping, when supplying
-arguments to macros; so they cannot also be used as math delimiters, or as
-arguments to macros such as \.{\char`\\big}. (One could change their catcodes
-to~12, and use some other pair of characters for grouping; but that
-would not be plain \TeX.)
-
-\bugonpage A346, lines 10--22 (11/24/19)
-
-\ninepoint\noindent
-number identification.) \ (2)~The registers
-\.{\char`\\count255}, \.{\char`\\dimen255}, \.{\char`\\skip255},
-\.{\char`\\toks255}, and \.{\char`\\muskip255}
-are freely available in the same way.
-\ (3)~All assignments to the scratch registers whose numbers are
-1,~3, 5, 7, and~9 should be \.{\char`\\global}; all assignments to the
-other scratch registers (0,~2, 4, 6, 8,~255) should be non-\.{\char`\\global}.
-\ (This prevents the phenomenon of ``save stack buildup'' discussed
-in Chapter~27.)
-\ (4)~Furthermore, it's possible to
-use any register in a group, if you ensure that \TeX's grouping
-mechanism will restore the register when you're done with the group, and
-if you are certain that other macros will not make global assignments
-to that register when you need it. \ (5)~But when a register is used
-by several macros, or over long spans of time, it should be allocated
-by \.{\char`\\newcount}, \.{\char`\\newdimen}, \.{\char`\\newbox},
-etc. \ (6)~Similar remarks
-apply to input/output streams used by \.{\char`\\read} and \.{\char`\\write},
-to math families used by \.{\char`\\fam}, to sets of hyphenation rules used by
-\.{\char`\\language}, and to insertions (which require
-\.{\char`\\box}, \.{\char`\\count}, \.{\char`\\dimen},
-and \.{\char`\\skip} registers all having the
-same number).\looseness=-1
-
-\bugonpage A347, line 6 (06/30/20)
-
-\ninepoint\noindent
-\tt \char`\\def\char`\\wlog\char`\{\char`\\immediate\char`\\write-1 \char`\}
-\ \char`\%\ this will write on log file (only)
-
-\bugonpage A347, line 10 (11/24/19)
-
-\ninepoint\noindent
-\tt \char`\\outer\char`\\def\char`\\newmuskip\char`\{\char`\\alloc@3%
-\char`\\muskip\char`\\muskipdef\char`\\@cclv\char`\}
-
-\bugonpage A347, line 14 (11/24/19)
-
-\ninepoint\noindent
-\tt \char`\\outer\char`\\def\char`\\newtoks\char`\{\char`\\alloc@5%
-\char`\\toks\char`\\toksdef\char`\\@cclv\char`\}
-
-\bugonpage A350, lines 15 and 16 from the bottom (01/17/21)
-
-\ninepoint\noindent
-format; it shouldn't cost much for people to acquire all the
-fonts of plain \TeX\ in addition to the ones that they really want. Second, it
-is desirable on many computer systems to\cutpar
-
-\bugonpage A364, line 5 from the bottom (01/14/21)
-
-\ninepoint\noindent
-\tt \char`\\def\char`\\fmtversion\char`\{3.1415926535\char`\}
-\ \char`\%\ identifies the current format
-
-\bugonpage A370, lines 11 and 12 (08/26/17)
-
-\ninepoint\noindent
-close as possible to the ASCII conventions.
-\ (b)~Make sure that codes \oct{041}--\oct{046}, \oct{060}--\oct{071},
-\oct{136}, \oct{141}--\oct{146}, and \oct{160}--\oct{171} are present and that
-each unrepresentable in-\cutpar
-
-\bugonpage A373, lines 21 and 22 (01/17/21)
-
-\ninepoint\noindent
-and \.{\char`\\if...\char`\\fi}
-tests, as well as special operations like \.{\char`\\the}
-and \.{\char`\\input}, while the
-latter category includes the primitive commands listed in Chapters~24--26.
-The expansion of\cutpar
-
-\bugonpage A375, bottom three lines (06/30/20)
-
-\ninepoint\noindent
-|$$\generaldisplay$$| to be invoked, with |\eq| defined to be $\alpha$.
-Furthermore, when an equation number~$\beta$ is present, it should be stored
-in |\eqn|, and the test |\ifeqno| should be true.
-In such cases |\ifleqno| should distinguish |\leqno| from |\eqno|.
-Here\cutpar
-
-\bugonpage A398, lines 4 and 5 (08/26/17)
-
-\ninepoint\indent
-|\setbox2=\lastbox \setbox\footins=\vbox{\box2}|\par
-\smallskip\noindent
-since |\lastbox| will be the result of\/ |\rigidbalance|, which is an hbox.
-
-\bugonpage A407, line 5 from the bottom (06/30/20)
-
-\ninepoint\noindent\quad
-| \interlinepenalty5000\def\par{\endgraf\penalty5000 }}|
-
-\bugonpage A413, line 11 from the bottom (05/14/19)
-
-\ninepoint\indent
-The computer file |texbook.tex| that generated {\sl The \TeX book\/} begins
-with a\cutpar
-
-\bugonpage A418, line 4 (05/14/19)
-
-\ninepoint\noindent
-\TeX\ commands
-that look like this in the file |texbook.tex|:
-
-\bugonpage A420, line 11 (06/30/20)
-
-\ninepoint\noindent
-|\def\bull{\vrule height.9ex width.8ex depth-.1ex \relax} % square bullet|
-
-\bugonpage A423, line 16 (06/30/20)
-
-\ninepoint\noindent
-| \vrule height6pt depth2pt width0pt \relax} % a strut for \insert\margin|
-
-\bugonpage A445, lines 10--14 (12/10/18)
-
-\ninepoint
-\textindent{\bf 15e.} Enclose the vbox that was constructed in Rule 15c or 15d by
-delimiters $(\lambda,\rho)$
-whose height plus depth is at least $\sigma_{20}$, if $C>T$, and at
-least $\sigma_{21}$ otherwise. Shift the delimiters up or down so that they are
-vertically centered with respect to the axis. Replace the generalized
-fraction by an Ord atom whose nucleus is the resulting sequence of three boxes
-($\lambda$, vbox, $\rho$). Go to rule~19.
-
-\bugonpage A446, the bottom three lines of Rule 19 become four lines (01/10/21)
-
-\ninepoint\noindent
-atom and the right boundary item to
-a Close atom. The entire resulting list now becomes the nucleus of an
-Inner atom. \ (All of the calculations in this step are done with
-$C$ equal to the starting style of the math list; style items in the
-middle of the list do not affect the style of the right boundary item.)
-
-\bugonpage A454, lines 17 and 18 from the bottom (04/13/20)
-
-\ninepoint\noindent
-of the process; the trial word consists of all the letters found in admissible
-items, up to a maximum of~63. Notice that all of these letters are in font~$f$.
-
-\bugonpage A458 and following, selected amendments to the index (01/18/21)
-
-\eightpoint
-|[1]| (progress report), 23, $\underline{119}$.\par
-|\aa| ( \aa\ ), {\it52}, $\underline{356}$.\par
-|\AA| ( \AA\ ), {\it52}, $\underline{356}$.\par
-\<disc text>, $\underline{287}$, 292.\par
-\<general text>, $\underline{276}$, 279, 280.\par
-\<horizontal mode material>, 278, 285, 287.\par
-integral signs, {\sl see\/} |\int|, |\oint|, |\smallint|.\par
-\<math mode material>, 287, 289--293.\par
-|\null|, 311, {\it312}, {\it316}, {\it332}, {\it335}, $\underline{351}$, {\it354}, {\it360}--{\it362}, {\it419}.\par
-|\o| ( \o\ ), {\it52}, $\underline{356}$.\par
-|\O| ( \O\ ), {\it52}, $\underline{356}$.\par
-programs, for computers, 38, 165, {\it234}.\par
-repeating templates, {\sl see\/} periodic preambles.\par
-replacement text, {\it200}--{\it204}, 212, 280, 300, 329.\par
-right delimiters, {\sl see\/} closings.\par
-struts, $\underline{82}$, 125, 131, 142, 155, 178, 245--247, 255, 329, 416, 422, 423.\par
-\<vertical mode material>, 278, 280--282, 290.
-
-
- % volume B
-\def\\#1{\hbox{\it#1\/\kern.05em}} % italic type for identifiers
-\def\dts{\mathrel{.\,.}} % double dot, used only in math mode
-
-\bugonpage Bv {(formerly Bvii)}, bottom two lines (01/15/21)
-
-\eightpoint\noindent
-all of those changes.
-I~now believe that the final bug was discovered on 22 October 2020
-and removed in version 3.141592653. % on 12 January 2021
-The finder's fee has converged to \$327.68.
-
-\hsize=35pc
-
-\bugonpage B2, line 10 from the bottom (01/15/21)
-
-\ninepoint\noindent\hskip10pt
-{\bf define} $\\{banner}\equiv\hbox{\tt\char'23}$%
-{\tt This\]is\]TeX,\]Version\]3.141592653\char'23}\quad
-$\{\,$printed when \TeX\ starts$\,\}$
-
-\bugonpage B4, line 8 of \S7 (04/02/17)
-
-\tenpoint\noindent
-diagnostic information for \.{\char`\\tracingparagraphs},
-\.{\char`\\tracingpages}, and \.{\char`\\tracingrestores}.
-
-\bugonpage B21, lines 33 and 34 (04/02/17)
-
-\def\Oct#1{\hbox{\rm\char'23\kern-.2em\it#1\/\kern.05em}} % octal constant
-\tenpoint\noindent
-$[\Oct{41}\to\Oct{46},\Oct{60}%
-\to\Oct{71},\Oct{136},\Oct{141}\to\Oct{146},\Oct{160}\to\Oct{171}]$ must be printable.
-Thus, at least 80 printable characters are needed.
-
-\bugonpage B28, lines 3 and 4 (04/02/17)
-
-\tenpoint\noindent
-not serious since we assume that this
-part of the program is system dependent.
-
-\bugonpage B28, line 2 from the bottom (04/02/17)
-
-\ninepoint\noindent\quad
-{\bf var} $k$: $0\dts23$;\quad$\{\,$index to current digit; we assume
- that $\vert n\vert<10^{23}\,\}$
-
-\bugonpage B35, line 2 of \S83 becomes two lines (06/27/20)
-
-\ninepoint\noindent\quad
-{\bf loop begin} \\{continue}: {\bf if} $\\{interaction}\ne\\{error\_stop\_mode}$
- {\bf then return};\par
-\noindent\qquad
-\\{clear\_for\_error\_prompt}; \ \\{prompt\_input}(\.{"?\]"});
-
-\bugonpage B36, line 11 of \S84 (07/03/20)
-
-\ninepoint\noindent\quad
-\.{"E"}: {\bf if} $\\{base\_ptr}>0$ {\bf then if}
- $\\{input\_stack}[\\{base\_ptr}].\\{name\_field}\ge256$ {\bf then}
-
-\bugonpage B36, line 5 of \S85 becomes two lines (07/03/20)
-
-\ninepoint\noindent\quad
-{\bf if} $\\{base\_ptr}>0$ {\bf then}\par
-\noindent\qquad
-{\bf if} $\\{input\_stack}[\\{base\_ptr}].\\{name\_field}\ge256$ {\bf then}
-\\{print}(\.{"E\]to\]edit\]your\]file."}
-
-\bugonpage B40, line 5 from the bottom (08/07/20)
-
-\ninepoint\noindent\qquad
-(\.{"Try\]to\]insert\]an\]instruction\]for\]me\](e.g.,\]%
- \char`\`I\char`\\showlists\char`\'),"})
-
-\bugonpage B58, lines 2 and 3 of \S136 (10/11/20)
-
-\tenpoint\noindent
-the values corresponding to `\.{\char`\\hbox\char`\{\char`\}}'.
-The \\{sub\_type}
-field is set to \\{min\_quarterword}, for historic reasons that are no
-longer relevant.
-
-\bugonpage B88, line 16 (10/22/20)
-
-\tenpoint\noindent
-The mode is temporarily set to zero while processing \.{\char`\\write} texts.
-
-\bugonpage B102, lines 3 and following of \S241 (12/11/20)
-
-\tenpoint\noindent
-information, something special
-is needed. The program here simply assumes that suitable values appear in
-the global variables \\{sys\_time}, \\{sys\_day}, \\{sys\_month}, and
-\\{sys\_year} (which are initialized to noon on 4 July 1776,
-in case the implementor is careless).
-\smallskip
-\ninepoint\noindent
-{\bf procedure} \\{fix\_date\_and\_time};\par
-\noindent\quad{\bf begin}
-$\\{sys\_time}\gets12\ast60$; \
-$\\{sys\_day}\gets4$; \
-$\\{sys\_month}\gets7$; \
-$\\{sys\_year}\gets1776$;\quad
-$\{\,$self-evident truths$\,\}$\par
-\noindent\quad$\\{time}\gets\\{sys\_time}$;\quad
- $\{\,$minutes since midnight$\,\}$\par
-\noindent\quad$\\{day}\gets\\{sys\_day}$;\quad$\{\,$day of the month$\,\}$\par
-\noindent\quad$\\{month}\gets\\{sys\_month}$;\quad$\{\,$month of the year$\,\}$\par
-\noindent\quad$\\{year}\gets\\{sys\_year}$;\quad$\{\,$Anno Domini$\,\}$\par
-\noindent\quad{\bf end};
-
-\bugonpage B103, replacement for \S246 (12/11/20)
-
-\tenpoint\noindent
-{\bf 246.}\quad Of course we had better declare a few more global variables,
-if the previous routines are going to work.
-\smallskip
-\ninepoint\noindent
-$\langle\,$Global variables {\sevenrm\kern.5em13}$\,\rangle+\equiv$\par
-\noindent\\{old\_setting}: $0\dts\\{max\_selector}$;\par
-\noindent\\{sys\_time}, \\{sys\_day}, \\{sys\_month}, \\{sys\_year}: \\{integer};
-\quad$\{\,$date and time supplied by external system$\,\}$
-
-\goodbreak
-\bugonpage B122, lines 9 and 10 of \S291 (10/12/20)
-
-\tenpoint\noindent\quad
-The enclosing \.{\char'173} and \.{\char'175} characters of a macro
-definition are omitted, but an output routine
-will be enclosed in braces.
-
-\bugonpage B143, lines 2, 3, 4 become four lines (01/15/17)
-
-\tenpoint\noindent
-routines that should be aborted, but we can sketch the
-ideas here: For a runaway definition or a runaway balanced text,
-we will insert a right brace; for a
-runaway preamble, we will insert a special \.{\char`\\cr} token and a right
-brace; and for a runaway argument, we will set \\{long\_state} to
-\\{outer\_call} and insert \.{\char`\\par}.
-
-\bugonpage B188, line 8 (04/02/17)
-
-\ninepoint\noindent
-{\bf function} \\{str\_toks}$(b:\\{pool\_pointer})$: \\{pointer};\quad
- $\{\,$converts \\{str\_pool}$[b\dts\\{pool\_ptr}-1]$ to a token list$\,\}$
-
-\bugonpage B192, line 17 (10/22/20)
-
-\ninepoint\noindent\quad
-{\bf label} \\{found}, \\{continue}, \\{done}, \\{done1}, \\{done2};
-
-\bugonpage B192, line 3 of \S474 (10/22/20)
-
-\ninepoint\noindent\qquad
-{\bf begin} \\{continue}: \\{get\_token};\quad$\{\,$set \\{cur\_cmd},
- \\{cur\_chr}, \\{cur\_tok}$\,\}$
-
-\bugonpage B193, line 4 of \S476 (05/20/20)
-
-\ninepoint\noindent\quad
-{\bf if} $\\{cur\_tok}<\\{left\_brace\_limit}$ {\bf then}
-
-\bugonpage B193, line 10 of \S476 becomes two lines (10/22/20)
-
-\ninepoint\noindent\qquad
-\\{help2}(\.{"I\char`\'m\]going\]to\]ignore\]the\]\#\]sign\]you\]just\]used,"})\par
-\noindent\qquad
-(\.{"as\]well\]as\]the\]token\]that\]followed\]it."});
-\\{error}; {\bf goto} \\{continue};
-
-\bugonpage B196, line 5 from the bottom (02/17/18)
-
-\ninepoint\noindent\qquad\quad
-\\{help1}(\.{"This\]\char`\\read\]has\]unbalanced\]braces."});
-$\\{align\_state}\gets1000000$;
-$\\{limit}\gets0$;
-\\{error};
-
-\bugonpage B199, lines 1--3 of \S494 (10/25/20)
-
-\tenpoint\noindent
-{\bf 494.} \ \ Here is a procedure that ignores text until coming to an \.{\char`\\or},
-\.{\char`\\else}, or \.{\char`\\fi} at the current level
-of $\.{\char`\\if}\ldots\.{\char`\\fi}$
-nesting. After it has acted, \\{cur\_chr} will indicate the token that
-was found, but \\{cur\_tok} will not be set (because this makes the
-procedure run faster).
-
-
-\bugonpage B214, lines 2--6 of \S536 (12/11/20)
-
-\ninepoint\noindent\quad
-{\bf begin} \\{wlog}(\\{banner});
-\\{slow\_print}(\\{format\_ident});
-\\{print}(\.{"\]\]"});
-\\{print\_int}(\\{sys\_day});
-\\{print\_char}(\.{"\]"});\par
-\noindent\quad
-$\\{months}\gets\.{\char`\'JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC\char`\'}$;\par
-\noindent\quad
-{\bf for} $k\gets3\ast\\{sys\_month}-2$ {\bf to} $3\ast\\{sys\_month}$
-{\bf do} \\{wlog}(\\{months}[$k$]);\par
-\noindent\quad
-\\{print\_char}(\.{"\]"});
-\\{print\_int}(\\{sys\_year});
-\\{print\_char}(\.{"\]"});
-\\{print\_two}(\\{sys\_time} {\bf div} 60);
-\\{print\_char}(\.{":"});\par
-\noindent\quad
-\\{print\_two}(\\{sys\_time} {\bf mod} 60);
-
-\bugonpage B214, line 2 of \S537 becomes two lines (10/29/20)
-
-\tenpoint\noindent
-command is being processed.
-Beware: For historic reasons, this code foolishly conserves a tiny bit
-of string pool space; but that can confuse the interactive `\.E' option.
-
-\bugonpage B214, bottom line (10/29/20)
-
-\ninepoint\noindent
-{\bf if} $\\{name}=\\{str\_ptr}-1$ {\bf then}
-\ $\{\,$conserve string pool space (but see note above)$\,\}$
-
-\bugonpage B219, lines 18--20 of \S545 (09/19/19)
-
-\tenpoint\noindent
-so-called boundary character of this font;
-the value of \\{next\_char} need not lie between \\{bc} and~\\{ec}.
-If the very last instruction of the \\{lig\_kern} array has $\\{skip%
-\_byte}=255$,
-there is a special ligature/kerning program for a boundary character at the
-left, beginning at location $256\ast\\{op\_byte}+$\cutpar
-
-\bugonpage B282, line 1 {(and change lines 20--23 accordingly)} (04/02/17)
-
-\tenpoint\noindent
-{\bf 682.} Each portion of a formula is classified as Ord, Op, Bin, Rel, Open,
-Close, Punct, or Inner, for\cutpar
-
-\bugonpage B299, line 4 from the bottom of \S722 (10/06/20)
-
-\ninepoint\noindent\qquad\quad
-{\bf begin} \\{char\_warning}(\\{cur\_f}, \\{qo}(\\{cur\_c}));
-$\\{math\_type}(a)\gets\\{empty}$;
-$\\{cur\_i}\gets\\{null\_character}$;
-
-\bugonpage B318, lines 16 and 17 of \S761 become one (03/25/19)
-
-\ninepoint\noindent
-\\{fraction\_noad}: $s\gets\\{fraction\_noad\_size}$;
-
-\bugonpage B333, line 5 of \S793 becomes two lines (01/10/20)
-
-\ninepoint\noindent\quad
-$\\{cur\_loop}\gets\\{link}(\\{cur\_loop})$;
-$\\{link}(p)\gets\\{new\_glue}(\\{glue\_ptr}(\\{cur\_loop}))$;\par
-\noindent\quad
-$\\{subtype}(\\{link}(p))\gets\\{tab\_skip\_code}+1$;
-
-\bugonpage B348, insert a new line after line 5 of \S826 (01/15/17)
-
-\ninepoint\noindent\qquad
-{\bf stat if} $\\{tracing\_paragraphs}>0$ {\bf then}
-\\{end\_diagnostic}(\\{true}); \ {\bf tats}
-
-\bugonpage B348, insert a new line to be the seventh line after the previous change (01/15/17)
-
-\ninepoint\noindent\qquad
-{\bf stat if} $\\{tracing\_paragraphs}>0$ {\bf then}
-\\{begin\_diagnostic}; \ {\bf tats}
-
-\bugonpage B377, line 6 (10/31/20)
-
-\ninepoint\noindent
-\\{hn}: $0\dts64$; \ $\{\,$the number of positions occupied in \\{hc};
- not always a \\{small\_number}$\,\}$
-
-\bugonpage B417, mini-index (04/02/17)
-
-\eightpoint\noindent
-The entry `\\{height}, \S981.' here and on many later
-odd-numbered pages should be `$\\{height}=\rm macro$, \S135.'
-
-\bugonpage B522, line 3 of \S1306. (10/25/20)
-
-\tenpoint\noindent
-to be in the range $a\le x\le b$.
-System error messages should be suppressed when undumping.
-
-\bugonpage B533, lines 5--8 of \S1333. (10/15/20)
-
-\tenpoint\noindent
-loop.
-(Actually there's one way to get error messages, via \\{prepare\_mag};
-but that can't cause infinite recursion.)\par
-\noindent\quad
-If \\{final\_cleanup} is bypassed, this program doesn't bother to
-close the input files that may still be open.
-
-\bugonpage B533, line 12 of \S1333. (11/29/20)
-
-\ninepoint\noindent\quad
-{\bf begin} $\langle\,$Finish the extensions{\sevenrm\kern.5em1378}$\,\rangle$;
-$\\{new\_line\_char}\gets-1$;
-
-\bugonpage B534, line 6 of \S1335. (11/29/20)
-
-\ninepoint\noindent\quad
-{\bf begin} $c\gets\\{cur\_chr}$;
-{\bf if} $c\ne1$ {\bf then} $\\{new\_line\_char}\gets-1$;
-
-\bugonpage B537, line 18 of \S1338 becomes two lines (10/05/20)
-
-\ninepoint\noindent\quad
-{\bf begin} \\{clear\_terminal};\par
-\noindent\quad
-{\bf loop}
-
-\bugonpage B537, lines 11 and 12 from the bottom of \S1338
- become three lines (04/02/17)
-
-\ninepoint\noindent\qquad\qquad
-{\bf begin goto} \\{breakpoint};\par
-\noindent\qquad\qquad\quad$\{\,$go to every declared label at least once$\,\}$\par
-\noindent\qquad\quad\\{breakpoint}: $m\gets0$;
- \.{@\char`\{\char`\'BREAKPOINT\char`\'@\char`\}}
-
-\bugonpage B600, the bottom five lines (05/14/19)
-
-\tenpoint\noindent
-they occupy in a typical production system
-(executable code size for dark blocks, global data size for light blocks).
-In this way the chart indicates a total of about
-$12\times22=264${\ninerm K} bytes of memory, plus
-$12\times10=120${\ninerm K} for the
-dynamic memory region not shown explicitly. The dynamic memory
-is often considerably larger in practice, because it is desirable to
-accommodate large macro packages and large pages.
-
-
- % volume C
-\hsize=29pc
-\def\\#1{\hbox{\it#1\/\kern.05em}} % italic type for identifiers
-\def\dashto{\mathrel{\hbox{-\thinspace-\kern-.05em}}}
-\def\ddashto{\mathrel{\hbox{-\thinspace-\thinspace-\kern-.05em}}}
-\def\tension{\mathop{\rm tension}}
-\def\controls{\mathop{\rm controls}}
-\def\and{\,{\rm and}\,}
-
-\bugonpage Cx, line 4 from the bottom (06/14/20)
-
-\count255=1
-\def\diamondleaders{\global\advance\count255 by 1
- \ifodd\count255 \kern-10pt \fi
- \leaders\hbox to 20pt{\ifodd\count255 \kern13pt \else\kern3pt \fi
- .\hss}}
-\line{\strut
- \hbox to\parindent{\bf\hbox to 1em{\hss20}\hss}%
- \rm More About Macros\diamondleaders\hfil\hbox to 2em{\hss175}}
-
-\bugonpage C39, lines 10 and 11 become three lines (07/04/20)
-
-\tenpoint\noindent
-that has already been designed. All you'll see is
-`|(io.mf| |The| |letter| |O| |[79])|' or possibly only `|(io.mf| |[79])|',
-followed by~`|*|'. Now the fun starts: You should type
-
-\bugonpage C68, lines 9, 28, 35, 36, 38 (11/11/17)
-
-\ninepoint
-\halign{\indent\hbox to 160pt{\tt#\hfil}&\tt#\hfil\cr
-uniformdeviate -100&-36.1628\cr
-z slanted 1/6&(0.16667y+x,y)\cr
-(a,b)zscaled(3,4)&(-4b+3a,3b+4a)\cr
-(a,b)zscaled dir 30&(-0.5b+0.86603a,0.86603b+0.5a)\cr
-(a,b)dotprod(3,4)&4b+3a\cr
-}
-
-\bugonpage C72, lines 4--18 (07/16/20)
-
-\ninepoint\noindent
-\beginsyntax
-<numeric atom>\is<numeric variable>
- \alt<numeric token primary>
- \alt[(]<numeric expression>[)]
- \alt[normaldeviate]
- \alt[length]<string primary>
- \alt[length]<path primary>
- \alt[length]<pair primary>
- \alt[angle]<pair primary>
- \alt[xpart]<pair primary>
- \alt[ypart]<pair primary>
- \alt<numeric operator><numeric primary>
-<numeric token primary>\is<numeric token>[/]<numeric token>
- \alt<numeric token not followed by %
- `{\tt/}$\thinspace\langle$numeric token$\rangle$'\thinspace>
-<numeric primary>\is<numeric atom not followed by {[\char'133]<expression>[,]}>
- \alt<numeric atom>[\char'133]<numeric expression>%
- [,]<numeric expression>[\char'135]
-\endsyntax
-
-\bugonpage C76, lines 8--16 from the bottom (11/11/17)
-
-\newdimen\longesteq
-\setbox0=\hbox{\indent$z_{12}-z_{11}=z_{14}-z_{13}$\quad}
-\longesteq=\wd0
-\tenpoint\noindent \hangindent\longesteq \hangafter0
-tom edge of the type.
-\ (With plain \MF's {\bf beginchar} each
-character has a ``bounding box'' that runs from $(0,h)$
-at the upper left and $(w,h)$ at the upper right to $(0,-d)$ and~$(w,-d)$
-at the lower left and lower right; variable $d$ represents the depth of
-the type. The values of $w$, $h$, and~$d$ might change from character to
-character, since the individual pieces of type need not have the same size
-in a computer-produced font.)
-
-\bugonpage C80, line 14 (06/13/20)
-
-\tenpoint\indent
-\\{penpos}\<suffix>(\<unknown>,\thinspace\<known>).
-
-\bugonpage C83, line 16 (06/13/20)
-
-\ninepoint\indent
-|### 0.5a=-c-0.5b+1.5|
-
-\bugonpage C83, line 19 (06/13/20)
-
-\ninepoint\noindent
-the only
-dependent variable is now $d$, which equals $0.5c+0.75b+0.75$. \ (This is\cutpar
-
-\bugonpage C96, line 13 from the bottom (10/31/20)
-
-\tenpoint\noindent
-illustrates the
-use of $u\0$, $s\0$, $\\{ht}\0$, \\{logo\_pen}, \\{leftstemloc}, $o$,
-\\{xgap}, and \\{barheight}:
-
-\bugonpage C106, lines 19--21 (07/03/20)
-
-\ninepoint\noindent
-pixels. \ (Some typesetting
-systems use both of these device-dependent amounts to alter their current
-position on a page, just after typesetting each character. Other systems,
-like typical |dvi| software associated with \TeX, assume that $\\{chardy}=0$
-but use \\{chardx}\cutpar
-
-\bugonpage C113, lines 5--11 from the bottom (07/20/20)
-
-\def\cycle{\hbox{\rm cycle}}
-\ninepoint\noindent
-\begindisplay
-$s\0:=5\\{pt}\0$; \ {\bf define\_pixels}$(s)$; \ \% side of the square\cr
-$z_1=(0,0)$; \ $z_2=(s,0)$; \ $z_3=(0,s)$; \ $z_4=(s,s)$;\cr
-{\bf for} $k=1$ {\bf upto} 4:
- $z[k+4]=z[k]+({2\over3}s,{1\over3}s)$; \ {\bf endfor}\cr
-{\bf pickup pencircle} scaled $.4\\{pt}$; \
-{\bf draw} $z_5\dashto z_6\dashto z_8\dashto z_7\dashto \cycle$;\cr
-{\bf pickup pencircle} scaled $1.6\\{pt}$; \
-{\bf erase draw} $z_2\dashto z_4\dashto z_3$;\cr
-{\bf pickup pencircle} scaled $.4\\{pt}$; \
-{\bf draw} $z_1\dashto z_2\dashto z_4\dashto z_3\dashto \cycle$;\cr
-{\bf for} $k=1$ {\bf upto} 4:
- {\bf draw} $z[k]\dashto z[k+4]$; \ {\bf endfor}.\cr
-\enddisplay
-
-\bugonpage C114, line 7 (07/20/20)
-
-\ninepoint\indent
-{\bf for} $k=0$ {\bf upto} 4: \ $z[k]=\\{center}+(\\{radius},0)$
- rotated$(90+{360\over5}k)$; \ {\bf endfor}
-
-\bugonpage C128, lines 13 and 14 (06/13/20)
-
-\ninepoint\noindent
-changed. Plain \MF\ has a {\bf tensepath} operation
-that does this. For example, {\bf tensepath}~\\{unitsquare}~$=$
-$(0,0)\ddashto(1,0)\ddashto(1,1)\ddashto(0,1)\ddashto\cycle$.
-
-\bugonpage C136, lines 18 and 19 (07/17/20)
-
-\ninepoint\noindent
-only
-about 0.28 with respect to the initial and final directions; since \MF\ insists
-that tensions be at least~0.75, this anomalous path could never have arisen
-if the control\cutpar
-
-\bugonpage C155, line 7 (10/07/20)
-
-\tenpoint\indent
-\<program>\is\<statement list>\<statement>\thinspace|end|
-
-\bugonpage C160, lines 7--9 (06/25/20)
-
-\ninepoint\noindent
-might produce a transcript
-that includes the following diagnostic information:
-\begintt
-rotatedaround(EXPR0)(EXPR1)->
- shifted-(EXPR0)rotated(EXPR1)shifted(EXPR0)
-\endtt
-
-\bugonpage C165, lines 5--7 from the bottom (11/11/17)
-
-\ninepoint\noindent
-(i.e., parameters in parentheses),
-then we name zero or one or two undelimited parameters.
-Then comes an `$=$'~sign,
-followed by the replacement text, and {\bf enddef}. The `$=$'~sign might also
-be~`$:=$'\thinspace; both mean the same thing.
-
-\bugonpage C171, lines 18--20 (08/16/20)
-
-\ninepoint\indent
-Chapter~14's syntax rules for
-\<path primary>, via \<pair primary>.
-A pair expression is not considered to be
-of type {\bf path} unless the path interpretation is the only~possibility.
-
-\bugonpage C176, line 7 from the bottom (07/09/20)
-
-\ninepoint\indent
-\quad {\bf if} |@#|$(\\{x\_})\colon\ \\{tx\_} \ \hbox{\bf else}\colon\
- \\{fx\_}\ \hbox{\bf fi}$
- :=\ \\{x\_}\thinspace; {\bf endfor}
-
-\bugonpage C180, line 3 from the bottom (06/24/20)
-
-\ninepoint\indent
-`$=$' or `$:=$' following {\bf let}.
-
-\bugonpage C187, line11 from the bottom (07/12/20)
-
-\ninepoint\indent\qquad
-\alt|substring|\thinspace\<pair expression>\thinspace|of|\thinspace
- \<string primary>
-
-\bugonpage C189, line 14 (06/13/20)
-
-\ninepoint\noindent
-`|! |' and followed
-by~`|.|', followed by lines of context as in \MF's normal error\cutpar
-
-\bugonpage C200, line 12 from the bottom (08/27/20)
-
-\ninepoint\indent
-$y_1=y_2=\\{good.y}(.5[-d,h]+1.1\\{pt})$;
-
-\bugonpage C202, line 17 from the bottom (06/13/20)
-
-\ninepoint\noindent
-command,
-and it works only when the \\{penpos} angle is~0. If the \\{penpos} command
-is\cutpar
-
-\bugonpage C210, bottom eight lines, and top ten lines of page C211 (07/16/20)
-
-\ninepoint\noindent
-\beginsyntax
-<numeric atom>\is<numeric variable>\alt<numeric argument>
- \alt<numeric token primary>
- \alt<internal quantity>
- \alt[normaldeviate]
- \alt[(]<numeric expression>[)]
- \alt[begingroup]<statement list><numeric expression>[endgroup]
- \alt[length]<numeric primary>\alt[length]<pair primary>
- \alt[length]<path primary>\alt[length]<string primary>
- \alt[ASCII]<string primary>\alt[oct]<string primary>\alt[hex]<string primary>
- \alt<pair part><pair primary>\alt<transform part><transform primary>
- \alt[angle]<pair primary>
- \alt[turningnumber]<path primary>\alt[totalweight]<picture primary>
- \alt<numeric operator><numeric primary>
- \alt[directiontime]<pair expression>[of]<path primary>
-<numeric token primary>\is<numeric token>[/]<numeric token>
- \alt<numeric token not followed by %
- `{\tt/}$\thinspace\langle$numeric token$\rangle$'\thinspace>
-<numeric primary>\is<numeric atom not followed by {[\char'133]<expression>[,]}>
- \alt<numeric atom>[\char'133]<numeric expression>%
- [,]<numeric expression>[\char'135]
-\endsyntax
-
-\bugonpage C214, line 6 becomes two lines (07/17/20)
-
-\ninepoint\noindent
-\beginsyntax
-<future pen primary>\is<future pen argument>
- \alt[pencircle]
-\endsyntax
-
-\bugonpage C214, line 6 from the bottom (07/12/20)
-
-\ninepoint\noindent
-\beginsyntax
- \alt[substring]<pair expression>[of]<string primary>
-\endsyntax
-
-\bugonpage C217, lines 20--25 (10/07/20)
-
-\ninepoint\noindent
-\beginsyntax
-<program>\is<statement list><non-title statement>[end]
- \alt<statement list><non-title statement>[dump]
-<statement list>\is<empty>\alt<statement>[;]<statement list>
-<statement>\is<empty>\alt<title>
- \alt<equation>\alt<assignment>\alt<declaration>
- \alt<definition>\alt<compound>\alt<command>
-\endsyntax
-
-\bugonpage C219, line 25 (05/25/20)
-
-\ninepoint\noindent
-to see which of its subscripts and suffixes have occurred.
-For example, if you're\cutpar
-
-\bugonpage C224, lines 7--9 from the bottom (12/21/18)
-
-\tenpoint\indent
-|y4r=-0.9848thinn+259.00049|\par
-|x4r=-0.08682thinn+144|\par
-|y4=-0.4924thinn+259.00049|
-
-\bugonpage C226, lines 9 and 10 (11/01/20)
-
-\ninepoint\noindent
-This means that the preloaded base you have specified cannot be used,
-because it is corrupted or was prepared for a different version of
-\MF\kern-.03em.
-
-\bugonpage C228, line 27 (06/19/20)
-
-\ninepoint\indent
-|l.94 endfor|
-
-\bugonpage C228, line 4 from the bottom (07/12/20)
-
-\ninepoint\noindent
-might want to review now.) \
-You probably also have a |proof| mode diagram:
-
-\bugonpage C234, line 4 of answer 4.6 (07/20/20)
-
-\ninepoint\indent
-{\bf for} $k=1$ {\bf upto} 6: $z[k]'=.2[z[k],z_0]$; {\bf endfor}
-
-\bugonpage C241, line 2 (11/11/17)
-
-\ninepoint\indent
-|\mode=cheapo; input cheaplogo10|
-
-\bugonpage C242, line 11 of answer 13.7 (07/20/20)
-
-\ninepoint\indent
-{\bf for} $k=1$ {\bf upto} 4:
- $z[k+4]=z[k]+({2\over3}s,{1\over3}s)$; \ {\bf endfor}
-
-\bugonpage C243, lines 7 and 8 (11/08/15)
-
-\ninepoint\indent
-\indent {\bf draw} subpath$(k,k+1)$ of \\{star}; {\bf cullit};\par\indent
-\indent {\bf undraw} subpath$(k+2,k+3)$ of \\{star} {\bf withpen}
- \\{eraser}; {\bf cullit};
-
-\bugonpage C243, line 3 of answer 13.11 (06/17/20)
-
-\ninepoint\indent
-{\bf def overdraw expr} $c$ = {\bf begingroup save} \\{region};
-
-\bugonpage C243, lines 12--16 of answer 13.11 (05/24/20)
-
-\ninepoint\noindent
-\begindisplay
-{\bf beginchar}$(\hbox{\tt"M"},1.25\\{in}\0,.5\\{in}\0,0)$; \
- {\bf pickup pencircle} scaled .4\\{pt};\cr
-$z_1=(20,-13)$; \ $z_2=(30,-6)$; \ $z_3=(20,1)$; \ $z_4=(4,-7)$;\cr
-\indent $z_5=(-12,-13)$; \ $z_6=(-24,-4)$; \ $z_7=(-15,6)$;\cr
-{\bf path} $M$; $M=(\\{origin}\dts
- z_1\dts z_2\dts z_3\dts z_4\dts z_5\dts z_6\dts z_7\dts$\cr
-\indent$\\{origin}\dts -z_7\dts -z_6\dts -z_5\dts -z_4\dts
- -z_3\dts -z_2\dts -z_1\dts\cycle)$\cr
-\enddisplay
-
-\bugonpage C246, line 2 of answer 14.13 (08/16/20)
-
-\ninepoint\noindent
-path $z_0\dashto z_1$ is equivalent to `$z_0\dts
-\controls1/3[z_0,z_1]\and2/3[z_0,z_1]\dts z_1$', and the\cutpar
-
-\bugonpage C247, line 1 of answer 15.5 (06/13/20)
-
-\ninepoint\noindent
-\quad{\bf 15.5.}\enspace
-{\bf beginchar}$(126,25u\0,\\{h\_height}\0+\\{border}\0,0)$; \
-|"Dangerous left bend"|;
-
-\bugonpage C247, replacement for answer 15.7 (07/21/20)
-
-\ninepoint\noindent
-\quad{\bf 15.7.}\enspace
-Replace lines 10 and 11 by
-\begindisplay
-{\bf pickup pencircle} scaled 3/4\\{pt} yscaled 1/3 rotated $-60$;\cr
-{\bf draw} ($z_1\ldots p$) transformed $t$;\cr
-{\bf addto} \\{currentpicture} {\bf also} \\{currentpicture}\cr
-\qquad rotatedaround$\bigl((.5w,.5h)$ yscaled \\{aspect\_ratio}$,-180\bigr)$;\cr
-\enddisplay
-
-\bugonpage C249, line 1 of answer 18.9 (08/02/20)
-
-\ninepoint\noindent
-\quad{\bf 18.9.}\enspace
-{\bf beginchar}\kern1pt(|"H"|$,13u\0,"ht"\0,0)$; \
- {\bf pickup} \\{broad\_pen};
-
-\bugonpage C249, line 11 of answer 18.9 (08/02/20)
-
-\ninepoint\indent
-{\bf filldraw} $\\{bot\_serif\_edge}_4$
-
-\bugonpage C250, line 4 of answer 19.1 (04/19/20)
-
-\ninepoint\noindent
-because it saves a wee bit of time and because
-`;'\ often belongs before {\bf endfor}.
-
-\bugonpage C250, replacement for answer 19.3 (07/12/20)
-
-\ninepoint\noindent
-\quad{\bf 19.3.}\enspace
-Yes, if and only if $n-{1\over2}$ is an even integer.
-\ (Because ambiguous values are rounded upwards.)
-
-\bugonpage C251, replacement for answer 22.1 (07/12/20)
-
-\ninepoint\noindent
-\quad{\bf 22.1}\enspace
-(a) If and only if $n$ is an integer between 0 and 255.
-(b) If and only if $s$ is a string of length~1.
-
-\bugonpage C254, lines 10--13 from the bottom become five lines (06/26/20)
-
-\ninepoint\noindent
-\begintt
-? H
-I found no right delimiter to match a left one. So I've
-put one in, behind the scenes; this may fix the problem.
-|null
-?
-\endtt
-
-\bugonpage C260, the ``line'' after line 3 (06/14/20)
-
-\def\bb{$\,\left\{\vcenter\bgroup\halign\bgroup\hfil##\hfil\cr}
-\def\ee{\crcr\egroup\egroup\right\}\,$}
-\tenpoint\noindent
-\bb|font_size|\cr|font_slant|\cr|font_normal_space|\cr
- |font_normal_stretch|\cr|font_normal_shrink|\cr|font_x_height|\cr
- |font_quad|\cr|font_extra_space|\ee
-\bb|=|\cr\noalign{\kern-2pt}|:=|\cr\noalign{\kern-2pt}\<empty>\ee
-\<numeric$\0$>; \
-\bb|ligtable|\<ligs/kerns>\cr|charlist|\<codes>\cr|extensible|\<codes>\cr
- |fontdimen|\<info>\cr|headerbyte|\<info>\ee;\kern-10pt
-
-\bugonpage C261, lines 16 and 17 from the bottom (06/14/20)
-
-\tenpoint\noindent
-\bb|proofrule|\cr|screenrule|\ee|(|\<pair>|,|\<pair>|)|; \
-|makegrid(|\<numerics>|)(|\<numerics>|)|;\smallskip\noindent
-|proofrulethickness| \<numeric$\0$>; \ |proofoffset| \<pair>.
-
-\bugonpage C266, lines 19 and 20 (07/04/20)
-
-\ninepoint\noindent
-You can say either `|incr|~|x|' or `|incr|~|(x)|', within
-an expression; but neither of them are valid statements by themselves.
-
-\bugonpage C269, line 11 (01/10/21)
-
-\ninepoint\indent
-|\smode="specmode"; mag=|\<magnification>|; input |\<font file name>
-
-\bugonpage C277, lines 15--19 (03/06/17)
-
-\ninepoint\noindent
-|def openit = openwindow currentwindow from origen % and please correct|\par
-\noindent
-| to (screen_rows,screen_cols) at (-50,300) enddef; % "(-50,300)" too|\par
-\noindent
-|def showit_ = display currentpicture inwindow currentwindow enddef;|\par
-\noindent
-|def showit = openit; let showit=showit_; showit enddef; % first time only|\par
-\kern3pt\hrule\medskip\noindent
-Plain \MF\ has several other terse commands
-similar to `{\bf openit}' and `{\bf showit}':
-
-\bugonpage C279, line 1 (11/11/17)
-
-\ninepoint\noindent
-| blacker:=.1; % make pens a teeny bit blacker|
-
-\bugonpage C289, line 20 (10/07/20)
-
-\ninepoint\indent
-|if {{(pair x) cand x>(0,0)}}: A else: B fi.|
-
-\bugonpage C291, line 18 (07/24/20)
-
-\ninepoint\indent
-| save u_; setu_ u; let switch_ = if; if false: enddef.|
-
-\bugonpage C292, line 10 from the bottom (10/23/20)
-
-\ninepoint\noindent
-be known by saying `{\bf if} known $(p-q)$: $p=q$ {\bf else}:~{\bf false fi}';
-transforms could be handled\cutpar
-
-\bugonpage C293, lines 13 and 14 from the bottom (10/27/20)
-
-\ninepoint\noindent
-$f(-1)$ is false! When $c\rightarrow0$, the quantity $a^3+b^3$
-approaches $-\infty$ when $c$~is positive, $+\infty$ when $c$~is
-negative. An attempt to `\\{solve} $f(1,-1)$' will divide by zero and
-come\cutpar
-
-\bugonpage C295, line 2 (07/04/20)
-
-\ninepoint\noindent
-`interpolate $(1,1)\dts(3,2)\dts(15,4)$ of~7' the approximate value 3.37.
-
-\bugonpage C299, bottom four lines of code become five (08/06/20)
-
-\ninepoint\noindent
-\begintt
-primarydef t Bernshtein nn = begingroup save r; r =
- begingroup for n=nn downto 2:
- for k=1 upto n-1: u_[[[k]]]:=t[[[u_[[[k]]],u_[[[k+1]]] ]]];
- endfor endfor u_[[[1]]] endgroup; numeric u_[[[]]];
- r endgroup enddef;
-\endtt
-
-\bugonpage C299, line 5 after the code becomes two lines (08/06/20)
-
-\ninepoint\noindent
-brackets are nested inside of brackets.
-However, the auxiliary variables `|u_[[[|$k$|]]]|' must not remain
-independent at the end.
-
-\bugonpage C305, lines 14--18 (07/08/20)
-
-\ninepoint\noindent
-|width_adj#:=0pt#; % width adjustment for certain characters|\par
-\noindent
-|serif_fit#:=0pt#; % extra sidebar near lowercase serifs|
-\vskip-3pt\noindent\qquad\vdots\par\noindent
-|low_asterisk:=false; % should the asterisk be centered at the axis?|\par
-\noindent
-|math_fitting:=false; % should math-mode spacing be used?|
-
-\bugonpage C317, line 21 becomes two lines (11/11/17)
-
-\ninepoint\noindent
-\beginsyntax
-<label>\is<code label>\alt<code>[::]\alt[\\\\:]
-<code label>\is\<code>[:]
-\endsyntax
-
-\bugonpage C318, lines 10--16 from the bottom (11/11/17)
-
-\ninepoint\noindent
-\beginsyntax
- \alt<code label><labeled code>
-<extensible command>\is[extensible]<code label><four codes>
-<four codes>\is<code>[,]<code>[,]<code>[,]<code>
-\endsyntax
-Notice that a \<code label> can appear in a {\bf ligtable}, {\bf charlist}, or
-{\bf extensible} command.
- These appearances are mutually exclusive: No code may be
-used more than once as a label. Thus, for example, a character with a
-ligature/kerning program cannot also be {\bf extensible}, nor can it be
-in a {\bf charlist} (except as the final item).
-
-\bugonpage C333, line 29 (10/25/19)
-
-\ninepoint\noindent
-| "if charcode>0:currentpicture:=currentpicture scaled mg;fi;"|
-
-\bugonpage C333, bottom two lines become one (11/11/17)
-
-\ninepoint\noindent
-| if unknown scale: scale := max(1,round(pixels_per_inch/300)); fi|
-
-\bugonpage C339, line 3 (05/21/20)
-
-\ninepoint\noindent
-ing `\char'31', `\char'32',
-`\char'33', and~`\char'34') and the uppercase letters (including
-`\char'35', `\char'36', and~`\char'37') are\cutpar
-
-\bugonpage C341, line 14 from the bottom (11/11/17)
-
-\ninepoint\noindent
-prints the |\table| and the |\text|; ^|\bigtest| gives
-you the works, plus a mysterious word\cutpar
-
-\bugonpage C345 and following, selected amendments to the index (01/20/21)
-
-\eightpoint
-*|,| (comma), 57, 72, 73, 129, 155, 165--167, 171, 211--213, 218, 317, 318.\par
-`A', 10--11, 163, 164, 248, 302--303.\par
-\<addto command>, 118, $\underline{220}$.\par
-bell-shaped distribution, $\underline{183}$, 251.\par
-|black|, 270, 332--333.\par
-\<code> and \<code label>, $\underline{317}$.\par
-concatenation, of paths, {\it70}--{\it71}, {\it123}, 127--129, $\underline{130}$, 137, {\it245}, {\it266}.\par
-\quad of strings, {\it69}, 73, 84--85, $\underline{187}$, {\it278}, {\it286}, {\it312}.\par
-*|directiontime|, {\it135}, $\underline{\it136}$, 211, 245, 265, {\it298}.\par
-distance, 76, 84, {\sl see also\/} |length|.\par
-|dotprod|, {\it68}--{\it69}, 178, {\it238}, 265.\par
-efficiency, 39, 99, 116, 141, 144, 147, 228, 230, 234, 244, 264, 265, 277, 291, 297, 298.\par
-empty option in {\bf for\/} list, 171, $\underline{172}$, {\it299}.\par
-forbidden tokens, 173, $\underline{218}$--$\underline{219}$, 286.\par
-*|from|, $\underline{191}$, 220, {\it252}, {\it277}, {\it312}.\par
-Giotto di Bondone, 139.\par
-independent variables, $\underline{81}$--$\underline{83}$, 88, 224, 226, 299.\par
-|\init|, $\underline{337}$, 342.\par
-internal quantities, 54--55, 88, 218, 262, 265--266.\par
-*|inwindow|, $\underline{191}$, 220, {\it277}.\par
-\<keep or drop>, $\underline{118}$, 220.\par
-|labels|, {\it107}, $\underline{274}$, 327--328.\par
-*|length|, {\it66}, {\it69}, 72, 210, 238.\par
-*|ligtable|, {\it97}, {\it305}--{\it306}, $\underline{316}$--$\underline{317}$.\par
-loops, 169, 171--173, 179, 226--227, 259, 290--291, 299.\par
-`N', 184--185, 302--303.\par
-\<numeric token primary>, 72, $\underline{211}$.\par
-|o|, {\it23}, {\it34}, $\underline{93}$, 197, 200, 204, 240, 302.\par
-`O', 32--37, 161, 199, 302--303.\par
-overshoot, 23, 34, 93, 197, 200, 204, 302.\par
-|penpos|, {\it26}--{\it29}, 37, 80, {\it103}, {\it162}, $\underline{273}$, 310.\par
-pens, 21--29, 147--152, 297--298.\par
-*|rotated|, {\it21}--{\it22}, {\it25}, 27, 44, {\it68}, 73, {\it107}, {\it114}, {\it117}, $\underline{141}$, 213, {\it238}.\par
-|rule|, 274, 328.\par
-*|scaled|, {\it21}--{\it23}, {\it68}, 73, $\underline{141}$, 213, 244, 291.\par
-*|showstopping|, 211, 219, {\it227}, 230, {\it262}.\par
-string expressions, {\it69}, 187--189, 258, 286.\par
-\<suffix list>, $\underline{171}$, 236.\par
-sum, of vectors, 9, {\it68}.\par
-|test.mf|, 311--313.\par
-\TeX, 1, 34, 40, 91, 96, 98, 101--103, 315, 336--343, 361.\par
-text arguments, 219, 288--291, 299.\par
-|.tfm|, 39, 315--321, 333, 335.\par
-*|to|, $\underline{191}$, 220, {\it252}, {\it277}, {\it312}.\par
-undelimited suffix parameters, $\underline{167}$, 176, 266, 270.\par
-|undraw|, 113, 118, 120, {\it242}, $\underline{271}$.\par
-|unitsquare|, {\it116}, 123--124, 128, 132, 136, $\underline{263}$.\par
-*|unknown|, $\underline{170}$, 210.\par
-unknown quantities, nonnumeric, 84--85, 143.\par
-values, disappearance of, 56, 83, 88, 156--157, 177--178, 218, 239, 299.\par
-\<vardef heading>, 165, $\underline{178}$.\par
-*|xscaled|, {\it21}--{\it22}, {\it68}, 73, $\underline{141}$, 213, 244, 291.\par
-
-
-
- % Volume D
-\def\\#1{\hbox{\it#1\/\kern.05em}} % italic type for identifiers
-\def\to{\mathrel{.\,.}} % double dot, used only in math mode
-
-\bugonpage Dv, line 16 (01/16/21)
-
-\tenpoint\noindent
-\kern12.5mm I believe that the final bug in \MF\ was discovered on January\cutpar
-
-\bugonpage Dv, bottom two lines (01/16/21)
-
-\eightpoint\noindent
-corporates all of those changes.
-I~now believe that the final bug was discovered on 03 July 2020
-and removed in version 2.71828182. % on 16 January 2021
-The finder's fee has converged to \$327.68.
-
-\hsize=35pc
-
-\bugonpage D2, last line of \S2 (01/15/21)
-
-\ninepoint\noindent
-$$\hbox{{\bf define} $\\{banner}\equiv\.{\char`\'This\]is\]METAFONT,\]Version\]2.71828182\char`\'}$\quad
-$\{\,$printed when \MF\ starts$\,\}$}$$
-
-\bugonpage D14, line 1 of \S30 (05/05/14)
-
-\tenpoint\noindent
-{\bf 20.} \quad The \\{input\_ln} function brings the next line of input from the specified
-file into available\cutpar
-
-\bugonpage D21, line 8 of \S47 (10/11/20)
-
-\ninepoint\noindent\quad
-$g$: \\{str\_number};\quad$\{\,$the string just created$\,\}$
-
-\bugonpage D27, lines 3 and 4 of \S61 (04/02/17)
-
-\tenpoint\noindent
-is not serious since we assume that this
-part of the program is system dependent.
-
-\bugonpage D28, line 7 (04/02/17)
-
-\ninepoint\noindent\quad
-{\bf var} $k$: $0\dts23$;\quad$\{\,$index to current digit; we assume
- that $\vert n\vert<10^{23}\,\}$
-
-\bugonpage D32, line 2 of \S78 becomes two lines (06/27/20)
-
-\ninepoint\noindent\quad
-{\bf loop begin} \\{continue}: {\bf if} $\\{interaction}\ne\\{error\_stop\_mode}$
- {\bf then return};\par
-\noindent\qquad
-\\{clear\_for\_error\_prompt}; \ \\{prompt\_input}(\.{"?\]"});
-
-\bugonpage D32, line 11 of \S79 (07/03/20)
-
-\ninepoint\noindent\quad
-\.{"E"}: {\bf if} $\\{file\_ptr}>0$ {\bf then if}
- $\\{input\_stack}[\\{file\_ptr}].\\{name\_field}\ge256$ {\bf then}
-
-\bugonpage D33, line 5 of \S80 (07/03/20)
-
-\ninepoint\noindent\quad
-{\bf if} $\\{file\_ptr}>0$ {\bf then}\par
-\noindent\qquad
-{\bf if} $\\{input\_stack}[\\{file\_ptr}].\\{name\_field}\ge256$ {\bf then}
-\\{print}(\.{"E\]to\]edit\]your\]file."}
-
-\bugonpage D37, line 9 of \S93 (08/07/20)
-
-\ninepoint\noindent\qquad
-(\.{"Try\]to\]insert\]an\]instruction\]for\]me\](e.g.,\]%
- \char`\`I\]show\]x;\char`\'),"})
-
-\bugonpage D82, line 2 from the bottom (09/19/19)
-
-\ninepoint\noindent\quad
-{\bf define} $\\{boundary\_char}=41$\quad$\{\,$the boundary character for ligatures$\,\}$
-
-\bugonpage D85, lines 3 and 4 of \S194 {(and \S194 actually moves to page D86)} (12/11/20)
-
-\tenpoint\noindent
-information, something special
-is needed. The program here simply assumes that suitable values appear in
-the global variables \\{sys\_time}, \\{sys\_day}, \\{sys\_month}, and
-\\{sys\_year} (which are initialized to noon on 4 July 1776,
-in case the implementor is careless).
-
-\bugonpage D85, the final six lines of \S194 {(and \S194 actually moves to page D86)} (12/11/20)
-
-\ninepoint\noindent
-{\bf procedure} \\{fix\_date\_and\_time};\par
-\noindent\quad{\bf begin}
-$\\{sys\_time}\gets12\ast60$; \
-$\\{sys\_day}\gets4$; \
-$\\{sys\_month}\gets7$; \
-$\\{sys\_year}\gets1776$;\quad
-$\{\,$self-evident truths$\,\}$\par
-\noindent\quad$\\{internal}[\\{time}]\gets\\{sys\_time}\ast\\{unity}$;\quad
- $\{\,$minutes since midnight$\,\}$\par
-\noindent\quad$\\{internal}[\\{day}]\gets\\{sys\_day}\ast\\{unity}$;\quad$\{\,$day of the month$\,\}$\par
-\noindent\quad$\\{internal}[\\{month}]\gets\\{sys\_month}\ast\\{unity}$;\quad$\{\,$month of the year$\,\}$\par
-\noindent\quad$\\{internal}[\\{year}]\gets\\{sys\_year}\ast\\{unity}$;\quad$\{\,$Anno Domini$\,\}$\par
-\noindent\quad{\bf end};
-
-\bugonpage D86, replacement for \S196 (12/11/20)
-
-\tenpoint\noindent
-{\bf 196.}\quad Of course we had better declare a few more global variables,
-if the previous routines are going to work.
-\smallskip
-\ninepoint\noindent
-$\langle\,$Global variables {\sevenrm\kern.5em13}$\,\rangle+\equiv$\par
-\noindent\\{old\_setting}: $0\dts\\{max\_selector}$;\par
-\noindent\\{sys\_time}, \\{sys\_day}, \\{sys\_month}, \\{sys\_year}: \\{integer};
-\quad$\{\,$date and time supplied by external system$\,\}$
-
-\bugonpage D97, line 2 of \S221 (05/26/17)
-
-\tenpoint\noindent
-the definition of attribute nodes) that
-it is convenient to let $\\{info}(p)=0$ stand for `\.{[]}'.
-
-\goodbreak
-\bugonpage D148, line 7 (06/12/18)
-
-\tenpoint\noindent
-but the $\log n$ factor is buried in our
-implicit restriction on the maximum raster size.) The\cutpar
-
-\bugonpage D237, line 5 of \S513 (05/26/17)
-
-\ninepoint\noindent\quad
-{\bf for} $n\gets0$ {\bf to} $\\{n1}-\\{n0}-1$ {\bf do} $\\{env\_move}[n]\gets\\{mm0}$;
-
-\bugonpage D250, line 2 of \S534 (05/26/17)
-
-\tenpoint\noindent
-direction $\bigl(\\{right\_u}(p),\\{left\_v}(q)\bigr)$;
-and there's a line of length $\ge\\{delta}$ from vertex~$q$ to vertex~$r$,\cutpar
-
-\bugonpage D296, line 11 (06/23/20)
-
-\tenpoint\noindent
-\\{name} points to the \\{eqtb} address of the macro
-being expanded, if the current token list\cutpar
-
-\bugonpage D324, line 13 of \S713 (12/20/20)
-
-\ninepoint\noindent\qquad\quad
-\\{help2}(\.{"After\]\char`\`exitif\]<boolean\]expr>\char`\'\]I\]expect\]to\]see\]a\]%
-semicolon."})
-
-\bugonpage D326, line 5 from the bottom (06/23/20)
-
-\ninepoint\noindent\qquad\qquad
-$\{\,$invokes a user-defined sequence of commands$\,\}$
-
-\bugonpage D334, lines 1 and 2 of \S742 (10/25/20)
-
-\tenpoint\noindent
-{\bf 742.} \ Here is a procedure that ignores text until coming to an {\bf elseif},
-{\bf else}, or {\bf fi} at the current level of {\bf if}$\,\ldots\,${\bf fi}
-nesting. After it has acted, \\{cur\_mod} will indicate the token that
-was found.
-
-\bugonpage D339, line 4 of \S757 (06/16/20)
-
-\tenpoint\noindent\quad
-(A user who tries some shenanigan like `{\bf for} $\ldots$ {\bf let} {\bf endfor}'
-will be foiled by the \\{get\_symbol}\cutpar
-
-\bugonpage D351, lines 2--7 of \S536 become five lines (12/11/20)
-
-\ninepoint\noindent\quad
-{\bf begin} \\{wlog}(\\{banner});
-\\{slow\_print}(\\{format\_ident});
-\\{print}(\.{"\]\]"});
-\\{print\_int}(\\{sys\_day});
-\\{print\_char}(\.{"\]"});\par
-\noindent\quad
-$\\{months}\gets\.{\char`\'JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC\char`\'}$;\par
-\noindent\quad
-{\bf for} $k\gets3\ast\\{sys\_month}-2$ {\bf to} $3\ast\\{sys\_month}$
-{\bf do} \\{wlog}(\\{months}[$k$]);\par
-\noindent\quad
-\\{print\_char}(\.{"\]"});
-\\{print\_int}(\\{sys\_year});
-\\{print\_char}(\.{"\]"});
-\\{print\_two}(\\{sys\_time} {\bf div} 60);
-\\{print\_char}(\.{":"});\par
-\noindent\quad
-\\{print\_two}(\\{sys\_time} {\bf mod} 60);
-
-\bugonpage D352, line 2 of \S793 becomes two lines (10/29/20)
-
-\tenpoint\noindent
-command is being processed.
-Beware: For historic reasons, this code foolishly conserves a tiny bit
-of string pool space; but that can confuse the interactive `\.E' option.
-
-\bugonpage D352, line 5 from the bottom (10/29/20)
-
-\ninepoint\noindent
-{\bf if} $\\{name}=\\{str\_ptr}-1$ {\bf then}
-\ $\{\,$conserve string pool space (but see note above)$\,\}$
-
-\bugonpage D354, line 2 from the bottom (07/29/20)
-
-\tenpoint\noindent
-$\\{cur\_type}=\\{path\_type}$ means that \\{cur\_exp} points to the first
-node of
-a path; nobody else points\cutpar
-
-\bugonpage D469, lines 18--20 of \S1093 (09/19/19)
-
-\tenpoint\noindent
-so-called boundary character of this font;
-the value of \\{next\_char} need not lie between \\{bc} and~\\{ec}.
-If the very last instruction of the \\{lig\_kern} array has $\\{skip%
-\_byte}=255$,
-there is a special ligature/kerning program for a boundary character at the
-left, beginning at location $256\ast\\{op\_byte}+$\cutpar
-
-\bugonpage D469, line 30 of \S1093 (01/15/21)
-
-\tenpoint\noindent
-tional halt; no ligature or kerning command is performed.
-
-\bugonpage D471, lines 20 and 21 (08/07/20)
-
-\ninepoint\noindent
-\\{param}: {\bf array} $[1\dts\\{max\_font\_dimen}]$ {\bf of}
-\\{scaled};\quad$\{\,${\bf fontdimen} parameters$\,\}$\par\noindent
-\\{np}: $0\dts\\{max\_font\_dimen}$;\quad$\{\,$the largest {\bf fontdimen} parameter
-specified so far$\,\}$
-
-\bugonpage D474, line 2 from the bottom (08/07/20)
-
-\ninepoint\noindent\quad\qquad
-\\{help1}(\.{"A\]colon\]should\]follow\]a\]headerbyte\]or\]fontdimen\]location."});
-\\{back\_error};
-
-\bugonpage D508, line 3 of \S1189. (10/05/20)
-
-\tenpoint\noindent
-to be in the range $a\le x\le b$.
-System error messages should be suppressed when undumping.
-
-\bugonpage D516, line 6 (10/15/20)
-
-\tenpoint\noindent\quad
-If \\{final\_cleanup} is bypassed, this program doesn't bother to
-close the input files that may still be open.
-
-\bugonpage D519, line 17 (01/15/21)
-
-\ninepoint\noindent\quad
-\\{fix\_date\_and\_time};
-$\\{init\_randoms}(\\{sys\_time}+\\{sys\_day}*\\{unity})$;
-
-\bugonpage D520, line 18 of \S1212 becomes two lines (10/05/20)
-
-\ninepoint\noindent\quad
-{\bf begin} \\{clear\_terminal};\par
-\noindent\quad
-{\bf loop}
-
-\bugonpage D520, lines 11 and 12 from the bottom of \S1212
- become three lines (04/02/17)
-
-\ninepoint\noindent\qquad\qquad
-{\bf begin goto} \\{breakpoint};\par
-\noindent\qquad\qquad\quad$\{\,$go to every declared label at least once$\,\}$\par
-\noindent\qquad\quad\\{breakpoint}: $m\gets0$;
- \.{@\char`\{\char`\'BREAKPOINT\char`\'@\char`\}}
-
-\bugonpage D566, the bottom five lines (05/14/19)
-
-\tenpoint\noindent
-they occupy in a typical production system
-(executable code size for dark blocks, global data size for light blocks).
-In this way the chart indicates a total of about
-$8\times22=176${\ninerm K} bytes of memory, plus
-$8\times15=120${\ninerm K} for the
-dynamic memory region not shown explicitly. The dynamic memory
-is often considerably larger in practice, because it is desirable to
-accommodate large macro packages and large pictures.
-
-
- % volume E
-\hsize=29pc
-
-\newbox\shorthyf \setbox\shorthyf=\hbox{-\kern-.05em}
-\mathchardef\period=`\.
-{\catcode`\-=\active \global\def-{\copy\shorthyf\mkern3.9mu}
- \catcode`\.=\active \global\def.{\period\mkern3mu}}
-\def\8#1{\mathrel{\mathcode`\.="8000 \mathcode`\-="8000
- #1\unkern}} % `..' and `--'
-
-
- \bye