summaryrefslogtreecommitdiff
path: root/systems/knuth/dist/errata/errata.three
blob: d4a0afaccd83c48680a62db87a4e77051482eee7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
% Bugs (sigh) in Computers \& Typesetting

\input manmac
\font\sltt=cmsltt10
\font\niness=cmss9
\font\ninessi=cmssi9
\proofmodefalse
\raggedbottom
\output{\hsize=29pc \onepageout{\unvbox255\kern-\dimen@ \vfil}}

\def\cutpar{{\parfillskip=0pt\par}}

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

\noindent This is a list of all corrections made to {\sl Computers \&
Typesetting}, Volumes A--E\null, between the date of publication
(May, 1986) and 15~June 1987.
It also includes corrections made to
the softcover version of {\sl The \TeX book}, beginning with the
sixth printing (January 1986); these are the same as corrections to
Volume~A\null. Corrections to the softcover version of {\sl The
\slMF\kern1ptbook\/} are the same as corrections to Volume~C\null.
% volume A
\bugonpage A7, fourth line from the bottom (6/28/86)

\tenpoint\line{%
since control sequences of the second kind always have exactly one
symbol after}

\bugonpage A35, second-last line (1/31/87)

\rightline{\eightssi He may run who reads.}
\smallskip
\rightline{\eightss--- HABAKKUK 2\thinspace:\thinspace2 (c.~600 B.C.)}
\smallskip
\rightline{\eightssi He that runs may read.}

\bugonpage A43, lines 8--9 (8/23/86)

\tenpoint\noindent
of Appendix B\null, which defines |%| to be a special kind of symbol so that you
can use it for comments, defines the control sequence |\%| to mean
a percent sign.

\bugonpage A45, lines 10--13 (8/23/86)

\ninepoint\noindent
\TeX\ adds~64. Hence
code 127 can be typed |^^?|, and
the dangerous bend sign can be obtained by saying
|{\manual^^?}|. However, you must change the category code of character
127 before using it, since this character ordinarily has category~15
(^{invalid}); say, e.g., |\catcode`\^^?=12|.
The |^^| notation is different from |\char|, because |^^|\cutpar

\bugonpage A76, line 7 (8/23/86)

\ninepoint
\noindent
and extra space; for example, these quantities are
$3.33333\pt$, $1.66666\pt$, $1.11111\pt$,\cutpar

\bugonpage A83, bottom line (5/19/87)

\tenpoint\noindent[This line should be flush right.]

\bugonpage A111, 7th-last line, right-hand column (2/15/87)

\ninepoint
if $b=10000$ and $-10000<p<10000$ and $q<10000$;

\bugonpage A117, second-last line (6/10/87)

\eightpoint
marks; sometimes also |$\|\||$| ($\Vert$).
You can say, e.g., `|\footnote\dag{...}|'.

\bugonpage A124, lines 6--11 (2/26/87)

\begingroup \def\n{\thinspace$n$}
\ninepoint\noindent
of insertion; an additional `|\penalty-10000|' item is assumed
to be present at the end of the vertical list, to ensure that a legal
breakpoint exists.) \ Let $u$ be the natural height plus depth of that
least-cost box, and let $r$ be the penalty associated with the optimum
breakpoint.  Decrease $g$ by~$uf$, and increase $q$ by~$r$. \ (If
|\tracingpages||=1|, the log file should now get a cryptic message that says
`|% split|\n\ |to| $v$|,|$u$ |p=|$r$'. For~example,
\begintt
% split254 to 180.2,175.3 p=100
\endtt
\endgroup

\bugonpage A158, lines 6--8 (2/20/87)

\ninepoint\noindent the
second atom, which has subscript~$i$; the superscripts are empty except for the
last atom, whose superscript is~$\overline{n+1}$. This superscript is
itself a math list consisting of one atom, whose nucleus is~$n+1$; and that
nucleus is a math list consisting of three atoms.

\bugonpage A171, line 20 (1/26/86)

\ninepoint\line{%
will be surrounded by more space than there would be
if that subformula were enclosed}

\bugonpage A176, line 1 (8/23/86)

\ninepoint
You can insert `|\noalign||{|$\langle$vertical mode
material$\rangle$|}|' just after any \kern-1pt|\cr| within\cutpar

\bugonpage A248, line 17 (6/17/86)

\ninepoint
`|&|' or `|\span|' or `|\cr|', it needs some way to decide which
alignment is involved.\cutpar

\bugonpage A249, line 20 (6/17/86)

\ninepoint\noindent
line (see Chapter~8).
If you don't want a~|\cr| at the end of a certain line,
just type\cutpar

\bugonpage A276, line 19 (1/27/86)

\ninepoint\vskip-3pt
\beginsyntax
  \alt^|\font|<control sequence><equals><file name><at clause>
  \alt<global assignment>
\endsyntax
[The bottom line of p.~276 will now move to the top of p.~277.]

\bugonpage A277, lines 31--32 (1/27/86)

\ninepoint
\beginsyntax
<font assignment>\is^|\fontdimen|<number><font><equals><dimen>
\endsyntax

\bugonpage A286, sixth-last line (4/28/87)

\ninepoint\noindent
|\sfcode| table as described in Chapter~12; characters numbered 128
to~255 set the\cutpar

\bugonpage A287, line 19 (2/15/87)

\ninepoint
\textindent{$\bull$}|\-|.\enskip
This ``discretionary hyphen'' command is defined in Appendix H.

\bugonpage A292, lines 9--10 (2/15/87)

\ninepoint
\textindent{$\bull$}|\-|.\enskip
This command is usually equivalent to `|\discretionary{-}{}{}|'; the `|-|' is
therefore interpreted as a ^{hyphen}, not as a minus sign.
\ (See Appendix~H.)

\bugonpage A308, lines 25--26 (6/1/87)

\ninepoint\indent
|\def\appendroman#1#2#3{\edef#1{\csname|\parbreak
|      \expandafter\gobble\string#2\romannumeral#3\endcsname}}|

\bugonpage A312, lines 10--14 (8/23/86)

\ninepoint
\ansno12.11: The interline glue will be zero, and the natural height is
$1+1-3+2=1\pt$ (because the depth of\/ |\box2| isn't included in the natural
height); so the glue will ultimately become |\vskip-1pt| when it's set.
Thus, |\box3| is $3\pt$ high, $2\pt$ deep, $4\pt$ wide. Its reference
point coincides with that of\/ |\box2|; to get to the reference point
of\/ |\box1| you go up $2\pt$ and right $3\pt$.

\bugonpage A312, line 21 (8/23/86)

\ninepoint\noindent
up $4\pt$ to get to the upper left corner of
|\box4|; then down $-1.6\pt$, i.e., up $1.6\pt$, to\cutpar

\bugonpage A319, line 20 (31/3/87)

\ninepoint\noindent
make ordinary periods act like |\cdot| symbols: Just define
|\mathcode`.| to be |"0201|,\cutpar

\bugonpage A328, lines 18--19 (5/14/87)

\ninepoint\noindent
not performed
while the expansion is taking place, and the control sequences following
|\def| are expanded; so the result is an infinite string
\begintt
A\def A\def A\def A\def A\def A\def A\def A\def A...
\endtt

\bugonpage A329, lines 14--15 (8/23/86)

\ninepoint
\ansno20.5: The |##| feature is indispensable when the replacement text of
a definition contains other definitions. For example, consider

\bugonpage A356, lines 6--7 (1/30/87)

\ninepoint\noindent
|  \spaceskip=.3333em \xspaceskip=.5em\relax}|\hfil\break
|\def\ttraggedright{\tt\rightskip=0pt plus2em\relax}|

\bugonpage A356, line 33 (6/1/87)

\ninepoint\noindent
|    \vbox to.2ex{\hbox{\char'26}\vss}\hidewidth}}|

\bugonpage A357, tenth-last line (10/13/86)

\ninepoint\noindent
|\let\sp=^ \let\sb=_        {\catcode`\_=\active \global\let_=\_}|

\bugonpage A357, third-last and second-last lines (2/17/87)

\ninepoint\noindent
|\def\pr@m@s{\ifx'\next\let\nxt\pr@@@s \else\ifx^\next\let\nxt\pr@@@t|%
\hfil\break\strut
|  \else\let\nxt\egroup\fi\fi \nxt}|

\bugonpage A364, fifth-last line (1/30/87)

\ninepoint\noindent
|\def\fmtname{plain}\def\fmtversion{2.3} % identifies the current format|

\bugonpage A368, bottom line (2/26/86)

\ninepoint
\line{that includes the symbols
{\tentex\char'30},~{\tentex\char1}, {\tentex\char'32}, {\tentex\char'34},
and~{\tentex\char'35}, and he finds that this makes it much more}

\bugonpage A396, line 13 (8/23/86)

\ninepoint
|  \hyphenpenalty=10000 \exhyphenpenalty=10000|

\bugonpage A414, line 10 (3/4/86)

\ninepoint\noindent
|\font\titlefont=cmssdc10 at 40pt   % titles in chapter openings|

\bugonpage A427, line 7 (2/23/86)

\ninepoint\noindent
the author's book
{\sl Computer Modern Typefaces}.)

\bugonpage A428, lines 18--20 (6/15/87)

\tenpoint\noindent
The first eight of these all have essentially the same layout;
but |cmr5| needs no ligatures, and many of the symbols of |cmti10|
have different shapes.
For example, the ^{ampersand} becomes an `^{E.T.}', and the
^{dollar} changes to ^{pound} ^{sterling}:

\bugonpage A434, lines 25--28 (8/17/86)

\tenpoint\noindent
from |\nu|~($\nu$). Similarly,
|\varsigma|~($\varsigma$) should not be confused with |\zeta|~($\zeta$).
It turns out that |\varsigma| and |\upsilon| are almost never used in
math formulas; they are included in plain \TeX\ primarily because they are
sometimes needed in short Greek citations (cf.~Appendix~J).

\bugonpage A447, line 32 (6/1/87)

\ninepoint\noindent
ters
also affect mathematical typesetting:
dimension parameters
 \hbox{|\delimitershortfall|}\cutpar

\bugonpage A455, new paragraph to follow line 9 (2/15/87)

\begingroup
\hyphenpenalty=-1000 \pretolerance=-1 \tolerance=1000
\doublehyphendemerits=-100000 \finalhyphendemerits=-100000
\ddanger The control sequence ^|\-| is equivalent to
|\discretionary{\char|$\,h$|}{}{}|, where $h$ is the
^|\hyphenchar| of the current font, provided that $h$ lies
between 0 and~255. Otherwise |\-| is equivalent to |\discretionary{}{}{}|.

\endgroup % end the special hyphenation conventions

\bugonpage A457, left column, fifth-last line (2/17/87)

\eightpoint\indent\qquad 155, 201, {\it 305}, 324, $\underline{357}$, 394--395;

\bugonpage A458, left column, line 6 (2/15/87)

\eightpoint\indent\hbox to0pt{\hss\lower1pt\hbox{*}}%
{\tt\char`\\-} (discretionary hyphen), 95, 283, 287,\par
\indent\qquad 292, $\underline{455}$.

\bugonpage A458, left column, near the bottom (5/19/87)

\eightpoint {\tt!} (exclamation point), 51,
{\it 72}, 73, 75, {\it 169}.
\nobreak\medskip\noindent[This saves a line that otherwise would make
the index too long on page 481!]

\bugonpage A458, right column, line 10 (11/27/86)

\eightpoint {\tt\char`\~}
(tilde), 38, 51, 343, $\underline{353}$; {\sl see also\/} ties.

\bugonpage A458, right column (6/14/87)

\eightpoint\indent\hbox to0pt{\hss\lower1pt\hbox{*}}%
{\tt\char`\\accent} (general accent), 9, 54, 86, 283, $\underline{286}$.

\bugonpage A461, entry for boxes (3/16/87)

\eightpoint boxes, 63--67, 77--83, 221--229.

\bugonpage A461, entry for {\tt\char`\\centering} (1/28/86)

\eightpoint {\tt\char`\\centering}, $\underline{347}$, 348, 362.

\bugonpage A462, entry for \<code assignment> (1/27/86)

\eightpoint \<code assignment>, $\underline{277}$.

\bugonpage A464, left column, line 3 (2/15/87)

\eightpoint
discretionary hyphens, 28, 95--96, 453, $\underline{455}$.

\bugonpage A465, right column, line 8 (5/3/87)

\eightpoint
expansion of expandable tokens, 212--216, 238,

\bugonpage A466, entry for {\tt\char`\\font}, second line (1/27/86)

\eightpoint \indent\qquad 271, $\underline{276}$.

\bugonpage A466, new entry (2/3/87)

\eightpoint \indent\<fontdef token>, $\underline{271}$.

\bugonpage A467, entry for {\tt\char`\\hideskip} (1/28/86)

\eightpoint {\tt\char`\\hideskip}, $\underline{347}$, 348, 354.

\bugonpage A468, left column line 2 (2/15/87)

\eightpoint\indent\qquad 351, 395, {\it 414}, 454, 455.

\bugonpage A470, entry for {\tt manfnt} (1/15/86)

\eightpoint {\tt manfnt}, 44, 408, 414.

\bugonpage A471, entry for {\tt\char`\\medbreak} (10/13/86)

\eightpoint {\tt\char`\\medbreak}, 111, 113, $\underline{353}$,
 {\it355}, {\it419}, {\it422}.

\bugonpage A471, entry for {\tt\char`\\moveright} (2/27/87)

\eightpoint\indent\hbox to0pt{\hss\lower1pt\hbox{*}}%
{\tt\char`\\moveright}, 80--81, {\it 221}, $\underline{282}$.

\bugonpage A471, entry for Mozart, second line (3/19/86)

\eightpoint \indent\qquad Gottlieb (= Theophilus = Amadeus), 409.

\bugonpage A472, the entry for {\tt\char`\\not} (2/12/87)

\eightpoint\noindent
[The overprinting here is intentional, since {\tt\char`\\not} is a
character of width zero. More than a dozen people have reported this
as an error, but it is not!]

\bugonpage A477, entry for {\tt\char`\\span} (5/3/87)

\eightpoint\indent\hbox to0pt{\hss\lower1pt\hbox{*}}%
{\tt\char`\\span}, 215, 238, $\underline{243}$, {\it244}, $\underline{245}$,
248, 249,\par
\indent\qquad 282, {\it330}, 385.

\bugonpage A479, entry for ties, second line (11/27/86)

\eightpoint \indent\qquad {\it173}, 353, {\it404}.

\bugonpage A480, changes to various entries (6/14/87)

\eightpoint
\newbox\astbox \setbox\astbox=\hbox to0pt{\hss\lower1pt\hbox{*}}
\def\prim#1{\par\indent\copy\astbox{\tt\char`\\#1}}
\prim{underline}, {\it130--131}, 141, 291, $\underline{443}$.
\prim{unhbox}, 120, 283, $\underline{285}$, {\it354}, {\it356}, {\it361},
 {\it399}.
\prim{unhcopy}, 120, 283, $\underline{285}$, {\it353}.
\prim{unkern}, $\underline{280}$.
\prim{unpenalty}, $\underline{280}$.
\prim{unskip}, 222--223, $\underline{280}$, 286, {\it313}, {\it392},
 {\it418--419}.
\prim{unvbox}, 120, 254, $\underline{282}$, 286, {\it354}, {\it361},
 {\it363}, {\it364}, {\it392}, {\it399}, {\it417}.
\prim{unvcopy}, 120, $\underline{282}$, 286, {\it361}.
\prim{vadjust}, 95, 105, 109, 110, 117, 259, $\underline{281}$, 393, 454.
\prim{valign}, 249, 283, $\underline{285}$--$\underline{286}$, 302,
 {\it335}, {\it397}.
\prim{vcenter}, 150--151, 159, 170, 193, 222, 242,
\prim{vfil}, 71, $\underline{72}$, 111, 256, 281, 286, 417.
\prim{vfill}, 24, 25, 71, $\underline{72}$, 256--257, 281, 286.
\prim{vfilneg}, $\underline{72}$, 111, 281, 286.\par
|\voidb@x|, $\underline{347}$, 348.

\bugonpage A481, left column (6/14/87)

\eightpoint\indent\hbox to0pt{\hss\lower1pt\hbox{*}}%
{\tt\char`\\vss}, 71, $\underline{72}$, {\it 255}, 281, 286.

% volume B
\hsize=35pc
\def\\#1{\hbox{\it#1\/\kern.05em}} % italic type for identifiers
\def\to{\mathrel{.\,.}} % double dot, used only in math mode

\buginvol B, in general (7/28/86)

\tenpoint\noindent
[A number of entries were mistakenly omitted from the mini-indexes
on the right-hand pages. Here is a combined list of all the missing
items; you can mount it inside the back cover, say, as a secondary mini-index
when the first one fails\dots\ ]

\nobreak\medskip
\setbox0=\vbox{\eightpoint \hsize=11pc \catcode`\_=\active \let_=\_
  \rightskip=0pt plus 100pt minus 10pt
  \pretolerance 10000
  \hyphenpenalty 10000 \exhyphenpenalty 10000
  \noindent\vbox to1pt{}\par % 1pt = \topskip - \ninept
  \def\&#1{\hbox{\bf#1\/}} % boldface type for reserved words
  \obeylines
  \def\makeref #1 #2 #3#4
   {\nn=#2 \hangindent=1em \noindent\\{#1}%
    \if#3:: \else\unhcopy\eqbox \fi#4, \S\number\nn.\par}
  \makeref active_base 222 =$1$
  \makeref aux 213 =macro
  \makeref begin_name 515 :\&{procedure}
  \makeref big_switch 1030 =$60$
  \makeref choice_node 689 =$15$
  \makeref cur_boundary 271 :$0\to \\{save\_size}$
  \makeref cur_c 724 :\\{quarterword}
  \makeref cur_group 271 :\\{group\_code}
  \makeref cur_i 724 :\\{four\_quarters}
  \makeref cur_level 271 :\\{quarterword}
  \makeref do_extension 1348 :\&{procedure}
  \makeref dvi_buf 595 :\&{array}
  \makeref dvi_gone 595 :\\{integer}
  \makeref dvi_limit 595 :\\{dvi\_index}
  \makeref dvi_offset 595 :\\{integer}
  \makeref dvi_ptr 595 :\\{dvi\_index}
  \makeref end_graf 1096 :\&{procedure}
  \makeref error 82 :\&{procedure}
  \makeref error_stop_mode 73 =$3$
  \makeref font_base 12 =$0$
  \makeref font_info 549 :\&{array}
  \makeref get_token 365 :\&{procedure}
  \makeref glue_base 222 =$2626$
  \makeref half_buf 595 :\\{dvi\_index}
  \makeref handle_right_brace 1068 :\&{procedure}
  \makeref hash_base 222 =$258$
  \makeref head 213 =macro
  \makeref hyf_distance 921 :\&{array}
  \makeref hyf_next 921 :\&{array}
  \makeref hyf_num 921 :\&{array}
  \makeref index 302 =macro
  \makeref inf 448 :\\{boolean}
  \makeref init_col 788 :\&{procedure}
  \makeref init_span 787 :\&{procedure}
  \makeref input_ln 31 :\&{function}
  \makeref interaction 73 :$0\to 3$
  \makeref limit 302 =macro
  \makeref line_width 830 :\\{scaled}
  \makeref macro_call 389 :\&{procedure}
  \makeref main_control 1030 :\&{procedure}
  \makeref mem 116 :\&{array}
  \makeref mem_bot 12 =$0$
  \makeref mem_end 118 :\\{pointer}
  \makeref mem_top 12 =macro
  \makeref mlist_to_hlist 726 :\&{procedure}
  \makeref mode 213 =macro
  \makeref mode_line 213 =macro
  \makeref more_name 516 :\&{function}
  \makeref mu 448 :\\{boolean}
  \makeref name 302 =macro
  \makeref nest 213 :\&{array}
  \makeref off_save 1064 :\&{procedure}
  \makeref open_log_file 534 :\&{procedure}
  \makeref output_active 989 :\\{boolean}
  \makeref p 498 :\\{pointer}
  \makeref param_stack 308 :\&{array}
  \makeref pool_file 50 :\\{alpha\_file}
  \makeref pool_ptr 39 :\\{pool\_pointer}
  \makeref prefixed_command 1211 :\&{procedure}
  \makeref prev_depth 213 =macro
  \makeref prev_graf 213 =macro
  \makeref prev_prev_r 830 :\\{pointer}
  \makeref print_err 73 =macro
  \makeref r 960 :\\{trie\_pointer}
  \makeref reconstitute 906 :\&{function}
  \makeref resume_after_display 1200 :\&{procedure}
  \makeref save_ptr 271 :$0\to \\{save\_size}$
  \makeref save_stack 271 :\&{array}
  \makeref scan_dimen 448 :\&{procedure}
  \makeref scan_math 1151 :\&{procedure}
  \makeref short_display 174 :\&{procedure}
  \makeref show_node_list 182 :\&{procedure}
  \makeref start 302 =macro
  \makeref state 302 =macro
  \makeref str_pool 39 :\&{packed}\ \&{array}
  \makeref str_ptr 39 :\\{str\_number}
  \makeref str_start 39 :\&{array}
  \makeref tail 213 =macro
  \makeref trap_zero_glue 1229 :\&{procedure}
  \makeref trie 921 :\&{array}
  \makeref trie_char 921 =macro
  \makeref trie_link 921 =macro
  \makeref trie_op 921 =macro
  \makeref vlist_out 629 :\&{procedure}
  \makeref write_loc 1345 :\\{pointer}
  }
\hbox{\nsize=\ht0 \advance\nsize-\topskip
  \divide\nsize by 3 \divide\nsize by\ninept
  \multiply\nsize by\ninept \advance\nsize\topskip
  \vsplit0 to\nsize \kern1pc
  \msize=\ht0 \advance\msize-\topskip
  \divide\msize by 2 \divide\msize by\ninept
  \multiply\msize by\ninept \advance\msize\topskip
  \vbox to\nsize{\vsplit0 to\msize\vss}\kern1pc
  \vbox to\nsize{\box0\vss}}

\buginvol B, in general (4/6/87)

\tenpoint\noindent[The percent signs in all the comments (for example,
on pages 7 and 50) are in the wrong font! Change `{\tt\%}' to `\%'.]

\bugonpage Bvi, bottom line, and top line of next page (10/12/86)

{\hsize=29pc
\tenpoint\noindent
puter Science Report 1097 (Stanford, California, April 1986), 146~pp.
\ {\it The {\sltt WEB} programs for four utility programs that are
often used with \TeX: {\sltt POOLtype}, {\sltt TFtoPL},
{\sltt PLtoTF}, and {\sltt DVItype}.}
\par}

\bugonpage B2, line 32 (4/22/87)

\ninepoint\noindent\hskip10pt
{\bf define} $\\{banner}\equiv\hbox{\tt\char'23}$%
{\tt This\]is\]TeX,\]Version\]2.2\char'23}\quad
$\{\,$printed when \TeX\ starts$\,\}$

\bugonpage B7, new line after line 25 (1/28/87)

\ninepoint\noindent\hskip10pt
{\bf if} $\\{max\_in\_open}\ge128$ {\bf then} $\\{bad}\gets6$;

\bugonpage B13, first three lines (4/7/87)

\tenpoint\noindent
The `\\{name}' parameter, which is of type `{\bf packed array
$[\langle\\{any}\rangle]$ of \\{char}}', stands for the name of
the external file that is being opened for input or output.
Blank spaces that might appear in \\{name} are ignored.

\bugonpage B14, line 30 (4/7/87)

\tenpoint\noindent
{\bf 31.\quad}%
The \\{input\_ln} function brings the next line of input from the specified
file into available\cutpar

\bugonpage B18, line 30 (5/22/86)

\ninepoint\noindent
\\{str\_ptr}: \\{str\_number};\quad
$\{\,$number of the current string being created$\,\}$

\bugonpage B21, first line of mini-index, right column (6/14/87)

\eightpoint
\indent\\{pool\_name}\unhcopy\eqbox|"string"|, \S11.

\bugonpage B34, lines 5--6 (6/14/87)

\tenpoint\noindent
to delete a token, and/or if some fatal error
occurs while \TeX\ is trying to fix a non-fatal one. But such recursion
is never more than two levels deep.

\bugonpage B55, lines 12--13 (4/21/87)

\ninepoint\noindent\hskip10pt
{\bf if} $r=p$ {\bf then if} $\\{rlink}(p)\ne p$ {\bf then}
  $\langle\,$Allocate entire node $p$ and {\bf goto} \\{found}%
  {\sevenrm\kern.5em129}$\,\rangle$;

\bugonpage B57, lines 25--28 (6/14/87)

\tenpoint\noindent
The first of these has $\\{font}=\\{font\_base}$, and its \\{link}
points to the second;
the second identifies the font and the character dimensions.
The saving feature about oriental characters is that most of them have
the same box dimensions. The \\{character} field of the first \\{char\_node}
is a ``\\{charext}'' that distinguishes between graphic symbols whose
dimensions are identical for typesetting purposes. (See the \MF\ manual.)
Such an extension of \TeX\ would not be difficult; further details are
left to the reader.

\bugonpage B58, second line of section 136 (7/23/86)

\tenpoint\noindent
the values corresponding to `|\hbox{}|'. The \\{subtype} field is set to
\\{min\_quarterword}, since that's\cutpar

\bugonpage B66, lines 2--8 (4/21/87)

\tenpoint\noindent
location is
more efficient than dynamic allocation when we can get away with it. For
example, locations \\{mem\_bot} to $\\{mem\_bot}+3$ are always used to store the
specification for glue that is `\hbox{\tt 0pt plus 0pt minus 0pt}'. The
following macro definitions accomplish the static allocation by giving
symbolic names to the fixed positions. Static variable-size nodes appear
in locations \\{mem\_bot} through \\{lo\_mem\_stat\_max}, and static
single-word nodes appear in locations \\{hi\_mem\_stat\_min} through
\\{mem\_top}, inclusive. It is harmless to let \\{lig\_trick} and
\\{garbage} share the same location of \\{mem}.

\bugonpage B67, line 23 (4/13/87)

\ninepoint\noindent\hskip30pt
$\{\,$previous \\{mem\_end}, \\{lo\_mem\_max}, and \\{hi\_mem\_min}$\,\}$

\bugonpage B71, line 17 (4/15/87)

\ninepoint\noindent\hskip10pt
{\bf begin while} $p>\\{mem\_min}$ {\bf do}

\smallskip\eightpoint\noindent[Now \\{null} can be removed from the mini-index.]

\bugonpage B74, line 24 (4/15/87)

\ninepoint\noindent
{\bf procedure} \\{show\_node\_list}($p\;{:}\;\\{integer}$);\quad
$\{\,$prints a node list symbolically$\,\}$

\bugonpage B74, line 33 (4/15/87)

\ninepoint\noindent\hskip10pt
{\bf while} $p>\\{mem\_min}$ {\bf do}

\bugonpage B84, line 12 (2/15/87)

\ninepoint\noindent\hskip10pt
{\bf define} $\\{relax}=0$\quad$\{\,$do nothing ( {\tt\char`\\relax} )$\,\}$

\bugonpage B86, third line of section 210 (8/23/86)

\tenpoint\noindent
that their special nature is easily discernible.
The ``expandable'' commands come first.

\bugonpage B88, line 23 (5/22/86)

\ninepoint\noindent
{\bf procedure\/}\  $\\{print\_mode}(m:\\{integer})$;\quad
$\{\,$prints the mode represented by $m\,\}$

\bugonpage B93, lines 3--4 (8/17/86)

{\tenpoint\parindent=1em
In the first region we have 128 equivalents for ``active characters'' that
act as control sequences, followed by 128 equivalents for single-character
control sequences.
\par}

\bugonpage B130, ninth-last line (5/7/87)

\tenpoint\noindent
This variable has six possible values:

\bugonpage B151, line 9 (4/22/87)

\ninepoint\noindent\hskip20pt
{\bf begin if} $(\\{end\_line\_char}<0)\lor(\\{end\_line\_char}>127)$
 {\bf then} \\{incr}(\\{limit});\par\noindent\hskip20pt
{\bf if} $\\{limit}=\\{start}$ {\bf then}\quad
 $\{\,$previous line was empty$\,\}$

\bugonpage B160, lines 17--20 (7/28/86)

\tenpoint\noindent
{\bf 389.\quad}%
After parameter scanning is complete, the parameters are moved to the
\\{param\_stack}. Then the macro body is fed to the scanner; in other words,
\\{macro\_call} places the defined text of the control sequence at the
top of\/ \TeX's input stack, so that \\{get\_next} will proceed to read it
next.

\bugonpage B200, top line (5/5/87)

\tenpoint\noindent{\bf 495.\quad}%
 When we begin to process a new {\tt\char`\\if}, we set
$\\{if\_limit}\gets\\{if\_code}$; then
if\/ {\tt\char`\\or} or {\tt\char`\\else} or {\tt\char`\\fi}\cutpar

\bugonpage B217, lines 15--16 (6/14/87)

\tenpoint\noindent
|DVI| format.

\bugonpage B224, lines 4--7 of section 560 (10/22/86)

\tenpoint\noindent
name and area strings \\{nom} and \\{aire}, and the
``at'' size~$s$. If $s$~is negative, it's the negative of a scale factor
to be applied to the design size; $s=-1000$ is the normal case.
Otherwise $s$ will be substituted for the design size; in this
case, $s$ must be positive and less than $2048\rm\,pt$
(i.e., it must be less than $2^{27}$ when considered as an integer).

\bugonpage B224, second-last line (4/28/87)

\ninepoint\noindent
\\{done}: {\bf if} \\{file\_opened} {\bf then} \\{b\_close}(\\{tfm\_file});\par
\noindent\hskip10pt $\\{read\_font\_info}\gets g$;

\bugonpage B255, mini-index at the bottom (4/15/87)

\eightpoint
$\\{mag}=\rm macro$, \S236.

\bugonpage B257, lines 11--13 (6/14/87)

\ninepoint
\noindent\hskip20pt{\bf if} $c\ge\\{qi}(128)$ {\bf then}
 \\{dvi\_out}(\\{set1});\par
\noindent\hskip20pt\\{dvi\_out}(\\{qo}($c$));

\bugonpage B260, lines 7--8 (4/15/87)

\tenpoint\noindent\hskip10pt
In the case of \\{c\_leaders} (centered leaders), we want to increase \\{cur\_h}
by half of the excess space not occupied by the leaders; and in the
case of \\{x\_leaders} (expanded leaders) we increase\cutpar

\bugonpage B267, mini-index at the bottom (4/15/87)

\eightpoint
\\{cur\_s}: \\{integer}, \S616.
$\\{mag}=\rm macro$, \S236.
$\\{pop}=142$, \S586.

\bugonpage B271, line 10 (8/23/86)

\tenpoint\noindent
which will be ignored in the calculations
because it is a highly negative number.

\bugonpage B285, lines 23 and 24 (5/4/87)

\tenpoint\noindent
the current string would be `{\tt.\char`\^.\char`\_/}'
if $p$ points to the \\{ord\_noad} for $x$ in the (ridiculous) formula
`{\tt\char`\$\char`\\sqrt\char`\{a\char`\^\char`\{\char`\\mathinner\char`\{%
b\char`\_\char`\{c\char`\\over x+y\char`\}\char`\}\char`\}\char`\}\char`\$}'.

\bugonpage B296, lines 3--5 (5/8/87)

\tenpoint\noindent
box~$b$ and
changes it so that the new box is centered in a box of width~$w$.
The centering is done by putting {\tt\char`\\hss} glue at the left and right
of the list inside $b$, then packaging the new box; thus, the
actual box might not really be centered, if it already contains
infinite glue.

\bugonpage B346, line 19 (5/19/87)

\ninepoint\noindent
\\{pass\_number}: \\{halfword};\quad
$\{\,$the number of passive nodes allocated on this pass$\,\}$

\bugonpage B350, lines 36 and 37 (1/28/87)

\ninepoint\noindent
$v$: \\{pointer};\quad
$\{\,$points to a glue specification or a node ahead of \\{cur\_p}$\,\}$
\par\noindent
$t$: \\{integer};\quad
$\{\,$node count, if \\{cur\_p} is a discretionary node$\,\}$

\bugonpage B353, lines 8--22 (1/28/87)

\ninepoint
\noindent\hskip10pt$s\gets\\{cur\_p}$;\par
\noindent\hskip10pt{\bf  if} $\\{break\_type}>\\{unhyphenated}$ {\bf then}
 {\bf if} $\\{cur\_p}\ne\\{null}$ {\bf then}\par
\noindent\hskip30pt$\langle\,$Compute the discretionary
 \\{break\_width} values{\sevenrm\kern.5em840}$\,\rangle$;\par
\noindent\hskip10pt{\bf  while} $s\ne\\{null}$ {\bf do}\par
\noindent\hskip30pt\vdots\hskip30pt [as before, but indented one less notch]\par
\noindent\hskip10pt{\bf end};

\bugonpage B354, line 6 (1/28/87)

\tenpoint\noindent
will be the background plus $l_1$, so the length from \\{cur\_p} to \\{cur\_p}
should be $\gamma+l_0+l_1-l$,
minus the length of nodes that will be discarded after the discretionary break.

\bugonpage B354, lines 12--18 (1/28/87)

\ninepoint
\noindent\hskip10pt{\bf begin} $t\gets\\{replace\_count}(\\{cur\_p})$;\kern5pt
  $v\gets\\{cur\_p}$;\kern5pt $s\gets\\{post\_break}(\\{cur\_p})$;\par
\noindent\hskip10pt{\bf while} $t>0$ {\bf do}\par
\noindent\hskip20pt{\bf begin} $\\{decr}(t)$;\kern5pt
 $v\gets\\{link}(v)$;\kern5pt
 $\langle\,$Subtract the width of node $v$ from \\{break\_width}%
 {\sevenrm\kern.5em841}$\,\rangle$;\par
\noindent\hskip20pt{\bf end};\par
\noindent\hskip10pt{\bf while} $s\ne\\{null}$ {\bf do}\par
\noindent\hskip20pt{\bf  begin} $\langle\,$Add the width of
  node $s$ to \\{break\_width} and increase $t$, unless it's
  discardable{\sevenrm\kern.5em842}$\,\rangle$;\par

\bugonpage B354, new line after line 21 (1/28/87)

\ninepoint\noindent\hskip10pt
{\bf if} $t=0$ {\bf then} $s\gets\\{link}(v)$;\quad
 $\{\,$more nodes may also be discardable after the break$\,\}$

\bugonpage B354, lines 26--34 (1/28/87)

\ninepoint\noindent
[Change `$s$' to `$v$' throughout this section (8 times).]

\bugonpage B354, line 9 from the bottom (1/28/87)

\tenpoint\noindent{\bf 842.\quad}%
\ninepoint$\langle\,$Add the width of
  node $s$ to \\{break\_width} and increase $t$, unless it's
  discardable{\sevenrm\kern.5em842}$\,\rangle\equiv$

\bugonpage B355, lines 1--3 (1/28/87)

\ninepoint
\noindent\hskip20pt$\\{hlist\_node},\\{vlist\_node},\\{rule\_node}$:
 $\\{break\_width}[1]\gets\\{break\_width}[1]+\\{width}(s)$;\par
\noindent\hskip20pt\\{kern\_node}: {\bf if} $(t=0)\land
 (\\{subtype}(s)\ne\\{acc\_kern})$ {\bf then}
  $t\gets-1$\quad$\{\,$discardable$\,\}$\par
\noindent\hskip30pt{\bf  else} $\\{break\_width}[1]\gets
 \\{break\_width}[1]+\\{width}(s)$;\par
\noindent\hskip20pt{\bf  othercases}
 \\{confusion}({\tt\char'42 disc2\char'42})\par
\noindent\hskip20pt{\bf endcases};\par
\noindent\hskip10pt$\\{incr}(t)$

\bugonpage B355, patches to mini-index at bottom (1/28/87)

\eightpoint
$\\{acc\_kern}=2$, \S155.\par
$\\{incr}=\rm macro$, \S16.\par
$t$: \\{integer}, \S830.\par
$v$: \\{pointer}, \S830.

\bugonpage B372, lines 12--14 (1/28/87)

\ninepoint
\noindent\hskip40pt$\langle\,$Change discretionary to compulsory
 and set $\\{disc\_break}\gets\\{true}${\sevenrm\kern.5em882}$\,\rangle$\par
\noindent\hskip30pt{\bf else if\/} $(\\{type}(q)=\\{math\_node})\lor
 (\\{type}(q)=\\{kern\_node})$ {\bf then} $\\{width}(q)\gets0$;

\bugonpage B380, fifth-last line (5/7/87)

\begingroup\tenpoint\noindent\def\!{\kern-1pt}\def\.#1{\hbox{\tt#1}}
\.b and \.c, the two patterns with and without hyphenation are
$\.a\,\.b\,\.-\,\.{c\!d}\,\.{e\!f}$ and $\.a\,\.{b\!c}\,\.{d\!e}\,\.f$.
Thus the\cutpar\endgroup

\bugonpage B386, lines 2--4 (5/21/87)

\tenpoint\noindent
hyphenation,
\TeX\ first looks to see if it is in the user's exception dictionary. If not,
hyphens are inserted based on patterns that appear within the given word,
using an algorithm due to Frank~M. Liang.

\bugonpage B397, line 28 (5/21/87)

\tenpoint\noindent
$h=z-c$. It follows that location \\{trie\_max} will
never be occupied in \\{trie}, and we will have\cutpar

\bugonpage B415, the mini-index (4/6/87)

\eightpoint\noindent[Delete the spurious entry for `$c$'.]

\bugonpage B419, mini-index entry for \\{c} (4/6/87)

\eightpoint $c$: \\{integer}, \S994.

\bugonpage B422, line 24 (8/23/86)

\ninepoint\noindent
\hskip20pt\\{prev\_p}: \\{pointer};\quad
$\{\,$predecessor of $p\,\}$

\bugonpage B435, line 16 (10/12/86)

\ninepoint\noindent
\hskip20pt$\\{width}(p)\gets\\{font\_info}[k].\\{sc}$;\quad
$\{\,$that's \\{space}$(f)\,\}$\par\noindent
\hskip20pt$\\{stretch}(p)\gets\\{font\_info}[k+1].\\{sc}$;\quad
$\{\,$and \\{space\_stretch}$(f)\,\}$\par\noindent
\hskip20pt$\\{shrink}(p)\gets\\{font\_info}[k+2].\\{sc}$;\quad
$\{\,$and \\{space\_shrink}$(f)\,\}$\par
\smallskip\eightpoint\noindent
[And the mini-index gets three new entries:
$\\{space}=macro$, \S558.
$\\{space\_shrink}=macro$, \S558.
$\\{space\_stretch}=macro$, \S558.]

\bugonpage B495, lines 18 and 19 (2/15/87)

\ninepoint\noindent
[delete these lines, since the cases cannot occur]

\bugonpage B510, line 8 (12/15/86)

\ninepoint\noindent\hskip30pt
({\tt"Pretend\]that\]you're\]Hercule\]Poirot:\]Examine\]all\]clues,"})

\bugonpage B527, new line to follow line 13 (6/17/86)

{\tenpoint\parindent=1em
This program doesn't bother to close the input files that may still be open.
\par}

\bugonpage B534, fourth-last line (5/4/87)

\ninepoint\noindent\hskip10pt
{\bf define} $\\{write\_stream}(\hbox{\tt\char`\#})\equiv\\{info}(
 \hbox{\tt\char`\#}+1)$\quad $\{\,$stream number (0 to 17)$\,\}$

\bugonpage B544, left column (1/28/87)

\eightpoint
\leftline{\\{acc\_kern}:\quad$\underline{155}$, 191, 837, 842, 879, 1125.}

\bugonpage B546, entry for \\{c} (4/6/87)

\eightpoint\noindent[Add a reference to section $\underline{994}$.]

\bugonpage B547, left column (4/7/87)

\eightpoint
\leftline{\\{char}:\quad 19, 26--27, 520, 534.}

\bugonpage B547, left column (6/14/87)

\eightpoint
\leftline{Chinese characters:\quad 134, 585.}

\bugonpage B553, entry for \\{font\_base} (6/14/87)

\eightpoint\noindent[Insert a reference to section 134.]

\bugonpage B555, right column, new entry (10/25/86)

\eightpoint
\leftline{{\tt Huge page...},\quad 641.}

\bugonpage B556, entry for \\{incr} (1/28/87)

\eightpoint\noindent[Add a reference to section 842.]

\bugonpage B557, entry for \\{is\_char\_node} (1/28/87)

\eightpoint\noindent[Delete the reference to section 881.]

\bugonpage B557, right column (6/14/87)

\eightpoint
\leftline{Japanese characters:\quad 134, 585.}

\bugonpage B560, right column (1/28/87)

\eightpoint
\leftline{\\{max\_in\_open}:\quad$\underline{11}$, 14, 304, 328.}

\bugonpage B561, left column, line 10 (4/15/87)

\eightpoint
\leftline{\qquad 169--172, 174, 178, 182, 1249, 1312, 1334.}

\bugonpage B561, left column (5/1/87)

\eightpoint
\leftline{{\tt Missing font identifier}:\quad 577.}

\bugonpage B563, left column, line 2 (4/15/87)

\eightpoint
\leftline{\qquad 136, 145, 149--154, 164, 168--169, 175--176, 182,}

\bugonpage B563, right column (6/14/87)

\eightpoint
\leftline{oriental characters:\quad 134, 585.}

\bugonpage B569, right column, in appropriate places (10/12/86)

\eightpoint
\leftline{\\{space}:\quad 547, $\underline{558}$, 752, 755, 1042.}
\leftline{\\{space\_shrink}:\quad 547, $\underline{558}$, 1042.}
\leftline{\\{space\_stretch}:\quad 547, $\underline{558}$, 1042.}

\bugonpage B570, third-last line (1/28/87)

\eightpoint\noindent\qquad
 786, 795, 809, 819--820, 822, 837, 842--844, 866,

\bugonpage B571, right column (10/25/86)

\eightpoint
\leftline{{\tt The following...deleted},\quad 641, 992, 1121.}

\bugonpage B571, right column (4/7/87)

\eightpoint
\leftline{\\{text\_char}:\quad $\underline{19}$, 20, 25, 47.}

\bugonpage B573, right column (5/1/87)

\eightpoint\noindent
[Delete the entry for `{\tt Undefined font code}'.]

\bugonpage B576, line 2 (1/28/87)

\ninepoint\noindent
$\langle\,$Add the width of
  node $s$ to \\{break\_width} and increase $t$, unless it's
  discardable{\sevenrm\kern.5em842}$\,\rangle$\par
\noindent\qquad {\eightpoint Used in section 840.}

\bugonpage B591, line 6 from the bottom (1/28/87)

\ninepoint\noindent
 $\langle\,$Subtract the width of node $v$ from \\{break\_width}%
 {\sevenrm\kern.5em841}$\,\rangle$\quad
 {\eightpoint Used in section 840.}

% volume C
\hsize=29pc
\def\\#1{\hbox{\it#1\/\kern.05em}} % italic type for identifiers

\bugonpage C14, top two lines (3/16/87)

\danger The recursive midpoint rule for curve-drawing was discovered in 1959
by Paul de Casteljau, who showed that the curve could be described
algebraically by the remarkably simple formula

\bugonpage C54, sixth-last to fourth-last lines (10/13/86)

\ninepoint Jonathan H. Quick (a student) used `|a.plus1|' as the name
of a variable at the beginning of his program; later he said `|let|
|plus=+|'. How could he refer to the variable `|a.plus1|' after that?

\bugonpage C76, line 14 (10/13/86)

\tenpoint
\newdimen\longesteq
\setbox0=\hbox{\indent$z_{12}-z_{11}=z_{14}-z_{13}$\quad}
\longesteq=\wd0
\noindent\hbox to \longesteq{\indent
  $x_4=w-.01\\{in}$\hfil}%
Point 4 should be one-hundredth of an inch inside\cutpar

\bugonpage C103, line 12 (10/12/86)

\tenpoint
$\\{ht}\0=\\{body\_height}\0$; \ $.5[\\{ht}\0,-\\{dp}\0]=\\{axis}\0$;

\bugonpage C105, line 13 (10/13/86)

\ninepoint
The vertical line just to the right of the italic left parenthesis
shows the italic\cutpar

\bugonpage C113, lines 20--27 (8/23/86)

{\catcode`\@=\active
\def@#1@{\begingroup\def\_{\kern.04em
    \vbox{\hrule width.3em height .6pt}\kern.08em}%
  \ifmmode\mathop{\bf#1}\else\hbox{\bf#1\/}\fi\endgroup}
\danger The command `@erase@ @fill@ $c$' is an abbreviation for
`@cullit@; @unfill@~$c$; @cullit@'; this zeros out the pixel values inside
the cyclic path~$c$, and sets other pixel values to~1 if they were positive
before erasing took place. \ (It works because the initial @cullit@ makes
all the values 0 or~1, then the @unfill@ changes the values inside~$c$
to 0 or negative. The final @cullit@ gets rid of the negative values,
so that they won't detract from future filling and drawing.) \ You can
also use `@draw@', `@filldraw@', or `@drawdot@' with `@erase@'; for example,
`@erase@ @draw@~$p$' is an abbreviation for `@cullit@; @undraw@~$p$;
@cullit@', which uses the currently-picked-up pen as if it were an
eraser applied to path~$p$.

}

\bugonpage C124, line 9 (6/17/86)

\eightpoint
\noindent\hskip1.8in
$\\{branch}_2=\\{flex}((30,570),(10,590),(-1,616))$

\bugonpage C130, 3rd-last line (9/25/86)

\ninepoint\noindent
{\sl Geometry\/ \bf 1} (1986), 123--140]: Given a sequence

\bugonpage C144, sixth line of the program (8/23/86)

\ninepoint\noindent\hbox to\parindent{\hfil\sevenrm6\ \ \ }%
$y_2=.1h$; \ $\\{top}\,y_3=.4h$;

\bugonpage C148, the line before the illustration (11/27/86)

\ninepoint\noindent
are polygons with 32 and 40 sides, respectively:

\smallskip\noindent
[New illustrations are needed here, since \MF\ version 1.3 improves
the accuracy of pen polygons.]

\bugonpage C149, 7th line after the illustration (10/24/86)

\ninepoint
\line{$(200,y+100\pm\alpha)$, where
$\alpha=\sqrt5/4\approx0.559$. If we digitize these outlines and fill the}

\bugonpage C178, second-last line (8/23/86)

\ninepoint\noindent
(If $t_3=t_1$~transum~$t_2$, then
$z$~transformed~$t_3=z$~transformed~$t_1+z$~transformed~$t_2$,\cutpar

\bugonpage C198, fifth-last and fourth-last lines (10/13/86)

\ninepoint\vskip-3pt
\begindisplay
$\\{top}\,y_2={\rm round}(\\{top}\,\beta)$.
\enddisplay
Such operations occur frequently in practice, so plain \MF\ provides
convenient\cutpar

\bugonpage C212, lines 9--11 from the bottom (8/23/86)

\ninepoint
\qquad
 \alt\[point]\<numeric expression>\[of]\<path primary>\continuerule
 \alt\[precontrol]\<numeric expression>\[of]\<path primary>\continuerule
 \alt\[postcontrol]\<numeric expression>\[of]\<path primary>

\bugonpage C233, lines 13--14 (2/15/87)

\ninepoint\noindent
one column of white
pixels, if the character is $2a$ pixels wide, because the right edge of
black pixels is specified here to have the $x$~coordinate $2a-1$.

\bugonpage C247, lines 23--25 (11/27/86)

\ninepoint
\ansno 16.2:
 `{\bf pencircle} scaled 1.06060' is the diamond but
`{\bf pencircle} scaled 1.06061' is~the square. \ (This assumes that
$\\{fillin}=0$. If, for example, $\\{fillin}=.1$, the change doesn't
occur until the diameter is 1.20204.) \ The next change is at diameter
1.5, which\cutpar

\bugonpage C262, lines 1--4 (7/28/86)

\ninepoint
When we come to macros whose use has not yet been explained---for
example, somehow |softjoin| and |stop| never made it
into Chapters 1 through~27---we shall consider them from a user's
viewpoint. But most of the comments that follow are addressed to a
potential base-file designer.

\bugonpage C266, line 16 (8/17/86)

\ninepoint\noindent
variables; they have the side effect of changing the variable's value.

\bugonpage C276, line 26 (6/23/86)

\ninepoint
\noindent
| if charic<>0: r((w+charic*hppp,h.o_),(w+charic*hppp,.5h.o_)); fi|

\bugonpage C286, lines 24--26 (10/13/86)

\ninepoint\noindent
but \MF\ won't let you. And even if this had worked, it wouldn't have
solved the problem; it would simply have put |ENDFOR| into the
replacement text of |ast|, because expansion is inhibited when the
replacement text is being read.

\bugonpage C290, line 1 (8/23/86)

\ninepoint  \noindent{\it 2.\enspace Fortuitous loops.\enspace}%
The `^{max}' and `^{min}' macros in Appendix~B make use of the fact\cutpar

\bugonpage C298, third-last line (8/23/86)

\ninepoint
$t[\,u_1,\ldots,u_n]\;=\;t\bigl[t[u_1,\ldots,u_{n-1}],t[u_2,\ldots,u_n]\,\bigr]$

\bugonpage C304, 14th-last line (2/15/87)

\ninepoint\noindent
[replace this `|\smallskip|' by a |\smallskip| between lines!]

\bugonpage C307, fifth-last line (12/7/86)

\ninepoint
{\def\_{\kern.04em
    \vbox{\hrule width.3em height .6pt}\kern.08em}%
\bf adjust\_fit}(\<left sidebearing adjustment>,\thinspace
  \<right sidebearing adjustment>);

\bugonpage C312, line 34 (10/12/86)

\ninepoint\noindent
|params[2] = "sans_params";      fontname[2] = "cmssbx10";|

\bugonpage C316, lines 19--21 (8/17/86)

\ninepoint\noindent
example,
`|(some| |charht| |values| |had| |to| |be| |adjusted| |by| |as| |much|
|as| |0.12pt)|' means that~you had too many different nonzero heights, but
\MF\ found a way to reduce the number to at most~15 by changing some of
them; none of them had to be\cutpar

\bugonpage C319, line 3 (8/23/86)

\ninepoint\noindent
specified by saying, e.g.,

\bugonpage C321, line 6 (7/28/86)

\ninepoint\noindent
|  special "identifier " & font_identifier_;|

\bugonpage C334, line 2 (6/23/86)

\ninepoint\noindent
|  currentpicture := currentpicture shifted-(1,1); pix := currentpicture;|

\bugonpage C339, tenth-last line (2/4/87)

\ninepoint\noindent
|  Jackie K\=aren {\L}au\.ra Mar{\'\i}a N\H{a}ta{\l}{\u\i}e {\O}ctave|

\bugonpage C343, second-last line (8/23/86)

\rightline{\eightssi
the precise needs of a precise but limited intellectual goal.}

\bugonpage C346, 2nd line of entry for `{\tt;}' (1/12/87)

\eightpoint
\qquad 217, 223--224, 263, 312.

\bugonpage C348, line 6 (6/17/86)

\eightpoint
concatenation, of paths, {\eightit 70--71}, {\eightit 123}, 127,

\bugonpage C348, just before `debugging' (3/16/87)

\eightpoint
de Casteljau, Paul de Faget, 14.

\bugonpage C348, right column (3/16/87)

\eightpoint\noindent
[The entry for `|define_whole_vertical_blacker_pixels|' should be moved up
before the entry for `|define_whole_vertical_pixels|'.]

\bugonpage C352, left column (6/1/87)

\eightpoint\indent\hbox to0pt{\hss\lower1pt\hbox{*}}%
{\tt kern}, {\it 97}, {\it 316}, $\underline{317}$.

\bugonpage C352, right column (3/8/87)

\eightpoint\noindent
[The entry for `|lowres|' belongs before the entry for `|lowres_fix|'.]

\bugonpage C353, left column (3/8/87)

\eightpoint\noindent
[The entries for `|mode|' and `\<mode command>' belong before the entry
for `|mode_def|'.]

\bugonpage C353, entry for {\tt mode\char`\_def} (8/17/86)

\eightpoint
{\tt mode\char`\_def}, 94, 189, $\underline{\smash{\hbox{\it 270}}}$,
{\it 278--279}.

\bugonpage C355, right column (4/15/86)

\eightpoint\noindent
[The entry for `{\tt rulepen}' belongs before the entry for `rules'.]

\bugonpage C355, right column (8/5/86)

\eightpoint
{\tt screenstrokes}, 191, $\underline{277}$.

\bugonpage C355, 2nd line of entry for `semicolons' (1/12/87)

\eightpoint
\qquad 217, 223--224, 263, 312.

\bugonpage C356, full names for the Stanfords (4/10/86)

\eightpoint
Stanford, Amasa Leland, 340.

Stanford, Jane Elizabeth Lathrop, 340.

% Volume D
\hsize=35pc
\def\\#1{\hbox{\it#1\/\kern.05em}} % italic type for identifiers
\def\to{\mathrel{.\,.}} % double dot, used only in math mode

\buginvol D, in general (7/28/86)

\tenpoint\noindent
[A number of entries were mistakenly omitted from the mini-indexes
on the right-hand pages. Here is a combined list of all the missing
items; you can mount it inside the back cover, say, as a secondary mini-index
when the first one fails\dots\ ]

\nobreak\medskip
\setbox0=\vbox{\eightpoint \hsize=11pc \catcode`\_=\active \let_=\_
  \rightskip=0pt plus 100pt minus 10pt
  \pretolerance 10000
  \hyphenpenalty 10000 \exhyphenpenalty 10000
  \noindent\vbox to1pt{}\par % 1pt = \topskip - \ninept
  \def\&#1{\hbox{\bf#1\/}} % boldface type for reserved words
  \obeylines
  \def\makeref #1 #2 #3#4
   {\nn=#2 \hangindent=1em \noindent\\{#1}%
    \if#3:: \else\unhcopy\eqbox \fi#4, \S\number\nn.\par}
  \makeref add_or_subtract 930 :\&{procedure}
  \makeref after 427 :\&{array}
  \makeref arg_list 720 :\\{pointer}
  \makeref b 580 :\\{pixel\_color}
  \makeref bad_exp 824 :\&{procedure}
  \makeref before 427 :\&{array}
  \makeref begin_name 770 :\&{procedure}
  \makeref bilin1 968 :\&{procedure}
  \makeref binary_mac 863 :\&{procedure}
  \makeref blank_rectangle 567 :\&{procedure}
  \makeref boc_c 1162 :\\{integer}
  \makeref boc_p 1162 :\\{integer}
  \makeref cf 298 :\\{fraction}
  \makeref clockwise 453 :\\{boolean}
  \makeref ct 298 :\\{fraction}
  \makeref cubic_intersection 556 :\&{procedure}
  \makeref cur_pen 403 :\\{pointer}
  \makeref cur_rounding_ptr 427 :$0\to \\{max\_wiggle}$
  \makeref cur_spec 403 :\\{pointer}
  \makeref cur_x 389 :\\{scaled}
  \makeref cur_y 389 :\\{scaled}
  \makeref dely 557 :\\{integer}
  \makeref dep_finish 935 :\&{procedure}
  \makeref dep_list 587 =macro
  \makeref dimen_head 1125 :\&{array}
  \makeref dx 495 :\\{integer}
  \makeref dy 495 :\\{integer}
  \makeref d1 464 :$0\to 1$
  \makeref end_name 772 :\&{procedure}
  \makeref eqtb 201 :\&{array}
  \makeref error_stop_mode 68 =$3$
  \makeref firm_up_the_line 682 :\&{procedure}
  \makeref get_next 667 :\&{procedure}
  \makeref gf_buf 1152 :\&{array}
  \makeref gf_offset 1152 :\\{integer}
  \makeref gf_ptr 1152 :\\{gf\_index}
  \makeref halfword 156 =$\\{min\_halfword}\to \\{max\_halfword}$
  \makeref hash 201 :\&{array}
  \makeref index 629 =macro
  \makeref input_ln 30 :\&{function}
  \makeref interaction 68 :$0\to 3$
  \makeref j 357 :$0\to \\{move\_size}$
  \makeref known_pair 872 :\&{procedure}
  \makeref limit 629 =macro
  \makeref m_spread 357 :\\{integer}
  \makeref materialize_pen 865 :\&{procedure}
  \makeref max_allowed 403 :\\{scaled}
  \makeref max_c 813 :\&{array}
  \makeref max_link 813 :\&{array}
  \makeref max_tfm_dimen 1130 :\\{scaled}
  \makeref mem_top 12 =macro
  \makeref mem 159 :\&{array}
  \makeref memory_word 156 =\&{record}
  \makeref more_name 771 :\&{function}
  \makeref m1 464 :\\{integer}
  \makeref n 580 :\\{screen\_col}
  \makeref n_sin_cos 145 :\&{procedure}
  \makeref name 629 =macro
  \makeref negate_dep_list 904 :\&{procedure}
  \makeref new_knot 871 :\&{function}
  \makeref node_to_round 427 :\&{array}
  \makeref n1 464 :\\{integer}
  \makeref octant_dir 395 :\&{array}
  \makeref o1 453 :\\{small\_number}
  \makeref o2 453 :\\{small\_number}
  \makeref paint_row 568 :\&{procedure}
  \makeref param 1096 :\&{array}
  \makeref param_stack 633 :\&{array}
  \makeref path_length 916 :\&{function}
  \makeref perturbation 1119 :\\{scaled}
  \makeref phi 542 :\\{angle}
  \makeref pool_ptr 38 :\\{pool\_pointer}
  \makeref post_head 843 :\\{pointer}
  \makeref pre_head 843 :\\{pointer}
  \makeref print_err 68 =macro
  \makeref print_macro_name 722 :\&{procedure}
  \makeref quarterword 156 =$0\to 255$
  \makeref recycle_value 809 :\&{procedure}
  \makeref row_transition 579 :\\{trans\_spec}
  \makeref scan_text_arg 730 :\&{procedure}
  \makeref scroll_mode 68 =$2$
  \makeref set_controls 299 :\&{procedure}
  \makeref sf 298 :\\{fraction}
  \makeref show_context 635 :\&{procedure}
  \makeref sorted 325 =macro
  \makeref st 298 :\\{fraction}
  \makeref start 629 =macro
  \makeref start_sym 1077 :\\{halfword}
  \makeref str_pool 38 :\&{packed}\ \&{array}
  \makeref str_ptr 38 :\\{str\_number}
  \makeref str_start 38 :\&{array}
  \makeref take_part 910 :\&{procedure}
  \makeref tfm_changed 1130 :\\{integer}
  \makeref tol 557 :\\{integer}
  \makeref tt 843 :\\{small\_number}
  \makeref tx 954 :\\{scaled}
  \makeref txx 954 :\\{scaled}
  \makeref txy 954 :\\{scaled}
  \makeref ty 954 :\\{scaled}
  \makeref tyx 954 :\\{scaled}
  \makeref tyy 954 :\\{scaled}
  \makeref unsorted 325 =macro
  \makeref uv 557 :$0\to \\{bistack\_size}$
  \makeref xy 557 :$0\to \\{bistack\_size}$
  \makeref x1 542 :\\{scaled}
  \makeref x2 542 :\\{scaled}
  \makeref x3 542 :\\{scaled}
  \makeref y1 542 :\\{scaled}
  \makeref y2 542 :\\{scaled}
  \makeref y3 542 :\\{scaled}
  }
\hbox{\nsize=\ht0 \advance\nsize-\topskip
  \divide\nsize by 3 \divide\nsize by\ninept
  \multiply\nsize by\ninept \advance\nsize\topskip
  \vsplit0 to\nsize \kern1pc
  \msize=\ht0 \advance\msize-\topskip
  \divide\msize by 2 \divide\msize by\ninept
  \multiply\msize by\ninept \advance\msize\topskip
  \vbox to\nsize{\vsplit0 to\msize\vss}\kern1pc
  \vbox to\nsize{\box0\vss}}

\buginvol D, in general (4/6/87)

\tenpoint\noindent[The percent signs in all the comments (for example,
on pages 7 and 42) are in the wrong font! Change `{\tt\%}' to `\%'.]

\bugonpage Dvii, line 9 (9/25/86)

{\tenpoint\noindent\hsize=29pc
{\sl Discrete and Computational Geometry\/ \bf1} (1986), 123--140.
\ \it Develops the theory\cutpar}

\bugonpage D2, line 27 (6/17/86)

\ninepoint\noindent\hskip10pt
{\bf define} $\\{banner}\equiv\hbox{\tt\char'23}$%
{\tt This\]is\]METAFONT,\]Version\]1.3\char'23}\quad
$\{\,$printed when \MF\ starts$\,\}$

\bugonpage D18, line 30 (5/22/86)

\ninepoint\noindent
\\{str\_ptr}: \\{str\_number};\quad
$\{\,$number of the current string being created$\,\}$

\bugonpage D23, second line of mini-index, right column (6/14/87)

\eightpoint
\indent\\{pool\_name}\unhcopy\eqbox|"string"|, \S11.

\bugonpage D30, lines 33--34 (6/14/87)

\tenpoint\noindent
to delete a token, and/or if some fatal error
occurs while \MF\ is trying to fix a non-fatal one. But such recursion
is never more than two levels deep.

\bugonpage D63, lines 13--14 (5/5/87)

\ninepoint\noindent
[These two lines can be eliminated, since the variable \\{temp\_ptr}
is no longer used! If you delete them, also remove \S158 from the
list of sections where global variables are declared (pages D7 and D552),
and remove \\{temp\_ptr} from the index on page D540.]

\bugonpage D66, line 6 (5/22/86)

\ninepoint\noindent
{\bf function\/}\  $\\{get\_node}(s:\\{integer})$: \\{pointer};\quad
$\{\,$variable-size node allocation$\,\}$

\bugonpage D66, lines 31--32 (3/16/86)

\tenpoint\noindent
controlled
growth helps to keep the \\{mem} usage consecutive when \MF\ is
implemented on ``virtual memory'' systems.

\bugonpage D67, lines 7--8 (4/21/87)

\ninepoint\noindent\hskip10pt
{\bf if} $r=p$ {\bf then if} $\\{rlink}(p)\ne p$ {\bf then}
  $\langle\,$Allocate entire node $p$ and {\bf goto} \\{found}%
  {\sevenrm\kern.5em171}$\,\rangle$;

\bugonpage D86, second line of section 198 (2/27/87)

\noindent
Individual class numbers have no semantic
or syntactic significance, except in a few instances\cutpar

\bugonpage D101, line 2 (3/16/86)

\tenpoint\line{%
like `{\tt x}', or they can
combine the structural properties of arrays and records, like `{\tt x20a.b}'.
A}

\bugonpage D102, line 24 (3/16/86)

\tenpoint\line{\kern10pt
In other words, variables have a hierarchical structure that includes
enough threads running}

\bugonpage D127, line 10 (5/5/87)

\ninepoint\noindent
[Variable $r$ can be eliminated, since it is not
used in this procedure! If you delete it, also remove $\underline{280}$
from the corresponding index entry on page D536.]

\bugonpage D129, line 15 (5/5/87)

\ninepoint\noindent
[This line can be eliminated, since \\{sine} and \\{cosine} are not
used in this procedure! If you delete them, also remove $\underline{284}$
from the corresponding index entries on pages D538 and D521.]

\bugonpage D142, line 23 (4/24/87)

\tenpoint\noindent
$(7-\sqrt{28}\,)/12$; the worst case
occurs for polynomials like $B(0,28-4\sqrt{28},14-5\sqrt{28},42;t)$.)

\bugonpage D178, third-last line (7/30/86)

\tenpoint\line{\quad
The following code maintains the invariant relations
$0\le \\{x0}<\max(\\{x1},\\{x1}+\\{x2})$, $\vert\\{x1}\vert<2^{30}$,}

\bugonpage D228, line 13 (7/30/86)

\ninepoint\noindent\kern10pt
{\bf while} $\\{max\_coef}<\\{fraction\_half}$ {\bf do}

\smallskip\eightpoint\noindent
The mini-index at the bottom of the next page should also receive the following
new entry:
\smallskip\indent
$\\{fraction\_half}={\rm macro}$, \S105.

\bugonpage D228, 10th-last line (5/5/87)

\ninepoint\noindent\hskip20pt
{\bf begin} $\\{right\_type}(p)\gets k$;
\smallskip
\noindent[Also eliminate `$q,$' seven lines above this, and delete
$\underline{497}$ from the index entry for \\{q} on page D536.]

\bugonpage D248, lines 16--21 (11/27/86)

\ninepoint\noindent\kern10pt
$\\{alpha}\gets\\{abs}(u)$;\kern5pt
 $\\{beta}\gets\\{abs}(v)$;\par\noindent\kern10pt
{\bf if} $\\{alpha}<\\{beta}$ {\bf then}\par\noindent\kern20pt
{\bf begin} $\\{alpha}\gets\\{abs}(v)$;\kern5pt
 $\\{beta}\gets\\{abs}(u)$;\kern5pt
{\bf end};\quad$\{\,$now $\alpha=\max(\vert u\vert,\vert v\vert)$,
 $\beta=\min(\vert u\vert,\vert v\vert)\,\}$\par\noindent\kern10pt
{\bf if} $\\{internal}[\\{fillin}]\ne0$ {\bf then}\par\noindent\kern20pt
$d\gets d-\\{take\_fraction}(\\{internal}[\\{fillin}],
 \\{make\_fraction}(\\{beta}+\\{beta},\\{delta}))$;\par\noindent\kern10pt
$d\gets\\{take\_fraction}((d+4)\;{\bf div}\;8,\\{delta})$;\kern5pt
$\\{alpha}\gets\\{alpha}\;{\bf div}\;\\{half\_unit}$;

\bugonpage D263, line 20 (3/16/86)

\tenpoint\noindent
instead of \\{false}, the other routines will simply log the fact
that they have been called; they won't\cutpar

\bugonpage D268, line 2 (4/28/87)

\tenpoint\noindent
Given the number~$k$ of an open window, the pixels of positive
weight in \\{cur\_edges} will be shown\cutpar

\bugonpage D301, line 6 of section 652 (5/5/87)

\ninepoint\noindent
[This line can be eliminated, since variable $s$ is not
used in this procedure! If you delete it, also remove $\underline{652}$
from the corresponding index entry on page D537; remove 652 from
the index entries for \\{param\_size} and \\{param\_start} on page D534;
and remove \\{param\_size} from the mini-index on page D301.]

\bugonpage D376, lines 17 and 18 (11/14/86)

\tenpoint\noindent
[these two mysterious lines should be deleted]

\bugonpage D380, line 11 (5/5/87)

\ninepoint\noindent
[Variables $q$ and $r$ can be eliminated, since they are not
used in this procedure! If you delete them, also remove $\underline{862}$
from the corresponding index entries on page D536.]

\bugonpage D429, line 14 (5/5/87)

\ninepoint\noindent\hskip10pt
{\bf begin} $p\gets\\{cur\_exp}$;
\smallskip
\noindent[Also eliminate line 12, and delete $\underline{985}$ from the
index entry for \\{vv} on page D543.]

\bugonpage D455, line 5 (5/5/87)

\ninepoint\noindent
[This line can be eliminated, since variable $t$ is not
used in this procedure! If you delete it, also remove $\underline{1059}$
from the corresponding index entry on page D540; remove 1059 from
the index entries for \\{small\_number} and \\{with\_option} on pages D539
and D544; and remove \\{with\_option} from the mini-index on page D455.]

\bugonpage D463, line 10 (12/15/86)

\ninepoint\noindent\hskip30pt
({\tt"Pretend\]that\]you're\]Miss\]Marple:\]Examine\]all\]clues,"})

\bugonpage D465, lines 17--18 (6/14/87)

\tenpoint\noindent
[Delete these two lines.]

\bugonpage D474, 5th-last line (3/16/86)

\tenpoint\noindent
depths, or italic corrections) are sorted;
then the list of sorted values is perturbed, if necessary.

\bugonpage D481, line 12 (6/17/86)

\ninepoint\noindent\hskip10pt
\\{print\_nl}({\tt\char`\"Font\]metrics\]written\]on\]\char`\"});\kern5pt
\\{print}(\\{metric\_file\_name});\kern5pt
\\{print\_char}({\tt\char`\".\char`\"});

\noindent\hskip10pt\\{b\_close}(\\{tfm\_file})

\smallskip\eightpoint\noindent
The mini-index at the bottom of this page should also receive the following
new entry:
\smallskip\indent
\\{print\_char}: {\bf procedure}, \S58.

\bugonpage D510, new line to follow line 5 (6/17/86)

{\tenpoint\parindent=1em
This program doesn't bother to close the input files that may still be open.
\par}

\bugonpage D510, just before the fifth-last line (8/5/86)

\ninepoint\noindent\hskip30pt$\\{internal}[\\{fontmaking}]\gets0$;\quad
$\{\,$avoid loop in case of fatal error$\,\}$

\bugonpage D520, right column (6/14/87)

\eightpoint
\leftline{Chinese characters:\quad 1147.}

\bugonpage D526, left column, lines 1--2 (7/30/86)

\eightpoint
\leftline{\indent\\{fraction\_half}:\quad
 $\underline{105}$, 111, 152, 288, 408, 496, 543,}
\leftline{\indent\qquad 1098, 1128, 1141.}

\bugonpage D526, left column, lines 6--7 (7/30/86)

\eightpoint
\leftline{\indent\qquad 478, 497, 499, 503, 530, 540, 547, 549, 599, 603,}
\leftline{\indent\qquad 612, 615, 815--816, 917, 1169--1170.}

\bugonpage D528, right column (6/14/87)

\eightpoint
\leftline{Japanese characters:\quad 1147.}

\bugonpage D530, right column, line 45 (7/30/86)

\eightpoint
\leftline{\indent\\{max}:\quad$\underline{539}$, 543.}

\bugonpage D533, right column (6/14/87)

\eightpoint
\leftline{oriental characters:\quad 1147.}

\bugonpage D535, right column, line 27 (6/17/86)

\eightpoint
\leftline{\indent\qquad 1134, 1163--1165, 1182, 1194, 1200, 1205, 1213.}

\bugonpage D547, bottom two lines (11/27/86)

\ninepoint\noindent
[These lines, and the top two on the next page, should move down
so that they appear in alphabetical order just before `Compute
test coefficients'.]
% volume E
\hsize=29pc
\def\dashto{\mathrel{\hbox{-\kern-.05em}\mkern3.9mu\hbox{-\kern-.05em}}}

\bugonpage Exiii, lines 1--2 (7/28/86)

\tenpoint\noindent
February 11--13, 1984), 49.
\ {\it An example meta-character of the Devanagari alphabet, worked out
``online'' with the help of Matthew Carter.}

\bugonpage Exiii, line 6 (7/28/86)

\tenpoint\noindent
{\it and western alphabets work also for Devanagari and Tamil.}

\bugonpage E12, lines 15 and 19 (7/23/86)

\tenpoint\noindent[change `17.32' to `17.28' in both places]

\bugonpage E12, third-last line (12/18/86)

\tenpoint\noindent[change `41' to `40']

\bugonpage E13, lines 3, 4, and 20 (12/18/86)

\tenpoint\noindent[change `40' to `41', `48' to `47', `17' to `7']

\bugonpage E18, line 20 (7/23/86)

\tenpoint\noindent[change `17.32' to `17.28']

\bugonpage E18, line 29 (12/9/86)

\tenpoint\noindent[change `236' to `212' in the {\tt cmss9} column]

\bugonpage E170, top illustration (11/2/86)

\tenpoint\noindent[There should be no ``dish'' or depression in the
vicinity of point {\tt 3r}; the top edge of the character should be
straight. This error appears also in the other uses of `\\{no\_dish\_serif}'
throughout the book, since the illustrations were made before
`\\{no\_dish\_serif}' was added to the program. See page
E180~(twice at the top), E370~(twice), E374~(twice), E376~(twice), E378~(top),
E390~(bottom), E398~(top), E402~(top), E406~(top), E453~(twice).]

\bugonpage E179, new line to be inserted after line 6 (10/13/86)

\ninepoint\noindent
{\bf if}  $\\{shaved\_stem}<\\{crisp}.\\{breadth}$:
  $\\{shaved\_stem}:=\\{crisp}.\\{breadth}$; {\bf fi}

\bugonpage E219, line 29 (6/2/87)

\ninepoint\line{\\{top} $y_1=h$; \ $x_1=x_2$; \
 {\bf filldraw stroke} $z_{1e}\dashto z_{2'e}$;\hfil\% stem}

\bugonpage E279, seventh line from the bottom (7/20/86)

\rightline{\eightssi that delicious but restrained humor which
 her readers found so irresistible.}

\bugonpage E301, new line to be inserted after line 28 (5/15/87)

\ninepoint\noindent
\quad{\bf if} $\\{lower\_side}>1.2\\{upper\_side}$:
  $\\{upper\_side}:=\\{lower\_side}$; {\bf fi}

\bugonpage E554, bottom half of page (12/18/86)

\ninepoint\noindent[The letters will change slightly because of the
corrections to {\tt cmr17} noted on pages 12 and 13.]

\bugonpage E561, line 3 (12/9/86)

\ninepoint\noindent[The numerals should be `\thinspace
{\niness 0123456789}\thinspace' (i.e., 2/3 point less tall)
because of the correction made to page 18.]

\bugonpage E562, line 9 (12/9/86)

\ninepoint\noindent[The numerals should be `\thinspace
{\ninessi 0123456789\/}\thinspace' (i.e., 2/3 point less tall)
because of the correction made to page 18.]

\bugonpage E572, entry for {\it breadth} (10/13/86)

\eightpoint
{\it breadth}, 59, 75, 79, 91, 93, 179, 225, 233,

\bugonpage E573, entry for {\tt cmcsc10} (8/17/86)

\eightpoint
{\tt cmcsc10}, $\underline{30}$--$\underline{31}$, 567.

\bugonpage E576, tenth-last line (5/15/87)

\eightpoint
{\bf lowres\kern.04em\vbox{\hrule width.3em height .6pt}\kern.08em
 fix}, 550.
\bye
Now here are some that I will make soon!