÷ƒ’À;è TeX output 1995.03.26:0043‹ÿÿÿÿŸ$Ÿæ’©Ùó$ý': cmti10ÏBugs–“çin“ó!p®0J cmsl10ÌComputers–UU&“T¸ãypGesetting,“1989‘ ËÜóò"V cmbx10Â1ŽŽŽ  ýúóKñ`y cmr10«This–§is“a“list“of“all“corrections“made“to“ÌComputers“&“T¸ãypGesetting«,‘ßýV‘ÿ*ªolumes“A{EŽ‘ã,Ž¤ bšGet•¸ãw“een–¸J20“F‘ÿ*ªebruary“1989“and“30“Septem¸ãb˜er“1989“(when“T‘þU>Ÿ'EŽ‘ãxX“V‘ÿ*ªersion“3.0“andŽ¡ó1*à=» manfntÜMETÇAFŽ9ONT–ËA«V‘ÿ*ªersion“2.0“wš¸ãere“fully“de ned).‘ÓŠCorrections“made“to“the“softco˜v˜erŽ¡v¸ãersion–Iof“ÌThe“T‘þU>Ÿ'EŽ‘ãxXb•Go“ok‘(«are–Ithe“same“as“corrections“to“V‘ÿ*ªolume“A.‘£CorrectionsŽ¡to–ˆûthe“softco•¸ãv“er›ˆûv“ersion˜of˜ÌThe˜Ü89:Ç;<Ž9=>:‘Ìb•Go“ok‘$?«are˜the˜same˜as˜corrections˜toŽ¡V‘ÿ*ªolume–J]C.‘ÊSome“of“these“corrections“ha•¸ãv“e–J]already“bGeen“made“in“reprin¸ãtings“of“theŽ¡b•Go“oks.‘ÌÇSevš¸ãeral–sªminor“c˜hanges“to“V‘ÿ*ªolumes“A“and“C‘s£are“not“sho˜wn“here“bGecauseŽ¡they–Ž5simply“makš¸ãe“roGom“for“the“more“substan˜tiv˜e“c˜hanges“needed“to“describGeŽ¡the–¥–new“features“of“T‘þU>Ÿ'EŽ‘ãxX“V›ÿ*ªersion“3.0“and“ÜMETÇAFŽ9ONT“«V˜ersion“2.0.‘b‹Hundreds“ofŽ¡c¸ãhanges–Ãwill“sošGon“b˜e“made“to“V‘ÿ*ªolumes“B“and“D‘µb˜ecause“of“the“upgrades“to“T‘þU>Ÿ'EŽ‘ãxXŽ¡and–G¿ÜMETÇAFŽ9ONT8ã«;“it“will“unfortunately“bšGe“imp˜ossible“to“do˜cumen¸ãt“all“of“thoseŽ¡c¸ãhanges.‘W¤Therefore,‘Æreaders–÷Iwho“need“up-to-date“information“on“the“T‘þU>Ÿ'EŽ‘ãxX“andŽ¡ÜMETÇAFŽ9ONT–kB«programs“should“refer“to“the“óßꓬ0,ŽŽŒ‹!CŸ$Ÿæ‘î@Â4ŽÏBugs–“çin“ÌComputers–UU&“T¸ãypGesetting,“1989ŽŽ  ýú¬all–™oinsertions“remain“in“place“(so“that“they“mighš¾9t“bAÇe“con˜tributed“again);‘»otherwise“theyŽ¤ are–ËNall“remo•¾9v“ed–ËNfrom“the“currenš¾9t“page“list“as“follo˜ws:‘ˆdThe“unsplit“insertions“are“ap-Ž¡pšAÇended–$ato“É\box‘Šª²n¬,‘($with“no“in¾9terline“glue“b˜et•¾9w“een–$athem.‘mø(Struts“should“b˜e“used,‘($as“inŽ¡the–=ùÉ\vfootnote“¬macro“of“AppAÇendix“B.)‘ÔXIf“a“split“insertion“is“presenš¾9t,‘H"it“is“e ectiv˜elyŽ¡É\vsplit–´…¬to“the“size“that“w¾9as“computed“previously“in“Step“4;‘the“top“part“is“treatedŽ¡as–ÑÄan“unsplit“insertion,‘ßand“the“remainder“(if“anš¾9y)“is“con˜v˜erted“to“an“insertion“as“ifŽ¡it–Cühad“not“bAÇeen“split.‘¨hThis“remainder,‘¦follo•¾9w“ed›Cüb“y˜an“y˜other˜ oating˜insertions˜ofŽ¡the–iÓsame“class,‘~óis“held“o•¾9v“er–iÓin“a“separate“place.‘ƒÀ(They“will“shoš¾9w“up“on“the“\curren˜tŽ¡page"–ÁTif“É\showlists“¬is“used“while“an“É\output“¬routine“is“activš¾9e;‘Uthe“total“n˜um˜bAÇer“ofŽ¡suc¾9h–á5insertions“appAÇears“in“É\insertpenalties“¬during“an“É\output“¬routine.)‘ 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öw(Plain–†T‘þuAŸïÿEŽ‘˜ŸX“tak¾9es“²–ù¬=“2–†and“²–ù¬=“3.)˜F‘ÿ:«urther-Ž¡more,‘ª:the–ritems“immediately“folloš¾9wing“the“trial“w˜ord“m˜ust“consist“of“zero“or“more“c˜har-Ž¡acters,–³¤ligatures,“and–`Èimplicit“k•¾9erns,‘³¤follo“w“ed–`Èimmediately“b¾9y“either“glue“or“an“ex-Ž¡plicit–bZkš¾9ern“or“a“pAÇenalt˜y“item“or“a“whatsit“or“an“item“of“v˜ertical“moAÇde“ma-Ž¡terial–üfrom“É\mark¬,–ÔåÉ\insert¬,“or›üÉ\vadjust¬.‘ iTh¾9us,“a˜bAÇo¾9x˜or˜rule˜or˜math˜for-Ž¡mš¾9ula–ãor“discretionary“follo˜wing“tošAÇo“closely“up˜on“the“trial“wš¾9ord“will“inhibit“h˜yphen-Ž¡ation.‘‹J(Since–:GT‘þuAŸïÿEŽ‘˜ŸX“inserts“emptš¾9y“discretionaries“after“explicit“h˜yphens,‘C„these“rules“im-Ž¡ply–d”that“already-hš¾9yphenated“compAÇound“w˜ords“will“not“bAÇe“further“h˜yphenated“b˜y“the“al-Ž¡gorithm.)ŽŽŒ‹ h´Ÿ$Ÿæ’©ÙÏBugs–“çin“ÌComputers–UU&“T¸ãypGesetting,“1989‘ ËÜÂ9ŽŽŽ  ýú‰ff\© €«Pš¸ãage–UUA455,“new“cop˜y“after“line“13’›ãu(9/23/89)ŽŸæf‰ff\Ÿ 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€«Pš¸ãage–UUB182,“line“13“bGecomes“t˜w˜o“lines’ÖU<(6/20/89)Ž¦‰ff¤Ÿ À²kCŽ;‘ŠªÐkkŽ‘ {—¬:‘pÐsmalxäl‘‘‰ffÕYŽ‘finumb‡erŽ‘;Õ°¬;‘ ?ü¸f›Šª¬n•¾9um“bAÇer–Tof“digits“in“a“decimal“fraction˜¸gŽ¡²p;–ŠªqRª¬:‘pÐp‡ointerŽ‘!ĉ¬;‘ ?ü¸f“¬top–Tof“decimal“digit“stac¾9k‘Šª¸gŽŸ¦f‰ff¤Ÿ €«P¸ãage–UUB182,“line“15“from“the“bGottom’Û±¨(6/20/89)Ž¦‰ff¤Ÿ À‘ ÃbK¼egin–T²k‘ÕT¸ ›‘Ƭ0;“²p˜¸ ˜ÐnulxälŽ‘P ¬;“Ðget‘‘‰ffÕYŽ‘fitokenŽ‘(¹0¬;‘ ?ü¸f‘ŠªÐp‡oint‘‘‰ffÕYŽ‘fitokenŽ‘2Ãà¬is“bAÇeing“re-scanned‘Šª¸gŽŽŒ‹ ‰ôŸ$Ÿæ‘è€Â12ŽÏBugs–“çin“ÌComputers–UU&“T¸ãypGesetting,“1989ŽŽ  ýú‰ff¤¤ €«P¸ãage–UUB182,“line“11“from“the“bGottom’Û±¨(6/20/89)Ž©æf‰ff¤Ÿ W‘ÃbK¼egin–T²q‘äp¸ ‘‘ÆÐget‘‘‰ffÕYŽ‘fiavailŽ‘%Òô¬;“ÐlinkŽ‘)Ó¬(²qšRª¬)–‘Ƹ “²p¬;‘TÐinfoŽ‘´Ã¬(²q˜¬)“¸ “Ðcur‘‘‰ffÕYŽ‘fitokŽ‘"œ¸¸‘8Ðzer‡o‘‘‰ffÕYŽ‘fitokenŽ‘,L¬;‘T²p“¸ “²q˜¬;‘TÐincrŽ‘²¹¬(²kCŽ¬);ŽŸ Õê‰ff¤¡«P¸ãage–UUB182,“line“8“from“the“bGottom’౩(6/20/89)Ž¦‰ff¤Ÿ ×ÂÐdone1Ž‘L-¬:‘pÃfor‘TÐkkŽ‘˜¸ ‘‘Ʋk‘XâÃdo•´Cwn“to–T¬1“ÃdoŽ¤ ‘bK¼egin‘TÐdigŽ‘)Ò¬[²kCŽk‘QƸ‘8¬1]–‘Ƹ “ÐinfoŽ‘15¬(²p¬);›T²q‘äp¸ “²p¬;˜²p“¸ 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W¬[Change–‘`127'“to“`255'“and“`128'“to“`256'“in“conš¾9texts“referring“to“c˜haracter“coAÇdes.‘ 'ThisŽŸ happAÇens–Ton“pages“188(thrice)“and“251.]ŽŸ Õê‰ff\¡«P¸ãage–UUC91,“lines“12“and“13’¿øÎ(8/31/89)Ž¦‰ff\Ÿ—¤Ëá‘$È\mode=cheapo;–?ýinput“newfaceŽŽŽ¡«and–UUthe“same“ le“should“also“proGduce“a“high-resolution“fonš¸ãt“if“w˜e“start“withŽŸ ‡±‰ff\¤ €P¸ãage–UUC204,“line“4’䱶(8/18/89)Ž¦‰ff\Ÿ ׬so–ythat“Ðcurr•‡enttr“ansformŽ‘L]ë¬mš¾9ultiplies“all“²y‘Ë»¬coAÇordinates“b˜y“Ðasp•‡e“ct‘‘‰ffÕYŽ‘fir“atioŽ‘2‡á¬,‘’when“paths“areŽŸ Uê‰ff\¡«P¸ãage–UUC212,“lines“24{27’Ì¿ë(9/30/89)Ž¦‰ff\Ÿ—¤Ëá‘$Ðb‡oundarycharŽ‘uÑë¬the–Trighš¾9t“bAÇoundary“c˜haracter“for“ligatures“and“k˜ernsŽŽ¡All–™Iof“these“quanš¾9tities“are“n˜umeric.‘¨NThey“are“initially“zero“at“the“start“of“a“job,Ž¤ except–£ifor“Ðye‡ar‘ø¬,–ÆîÐmonth‘¶9¬,“Ðday‘ÍU¬,“and›£iÐtime‘® 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128{255.‘`cHo•¸ãw“ev“er,‘+—ÜMETÇAFŽ9ONT–!(«programs“that“makš¸ãe“use“of“an˜ything“in“additionŽ¡to–‡the“95“standard“ASCIšGI‘†éc¸ãharacters“cannot“b˜e“exp˜ected“to“run“on“other“systems,Ž¡so–UUthe“use“of“extended“c¸ãharacter“sets“is“discouraged.ŽŸX-‰ff\Ÿ €P¸ãage–UUC316,“bGottom“14“lines“and“top“30“of“page“C317‘I£g(9/30/89)Ž¦‰ff\© @‘$¬Ligature–ýinformation“and“k¾9erning“information“is“spAÇeci ed“in“short“\ligtableŽ¤ programs"–Êmof“a“particularly“simple“form.‘;ºHere's“an“example“that“illustrates“most“ofŽ¡the–Tfeatures“(although“it“is“not“a“serious“example“of“t¾9ypAÇographic“practice):ŽŸ¦f‰ff\Ÿ Éligtable–¹–"f":“"f"“=:“oct"013",“"i"“|Ž‘ s,=:“oct"020",“skipto“1;Ž¡ligtable–¹–"o":“"b":“"p":“"e"“kern“.5u#,“"o"“kern“.5u#,“"x"“kern-.5u#,Ž¡‘/?Ü1::–¹–"!"“kern“u#;ŽŸff‰ff\¦¬This–Tsequence“of“instructions“can“bAÇe“paraphrased“as“follo¾9ws:Ž©‘$Dear–eT‘þuAŸïÿEŽ‘˜ŸX,“when“yš¾9ou're“t˜ypAÇesetting“an“`f‘´q'“with“this“fon˜t,‘Iband“when“the“follo˜wingŽ¡‘$cš¾9haracter–='also“bAÇelongs“to“this“fon˜t,‘GlošAÇok“at“it“closely“b˜ecause“yš¾9ou“migh˜t“needŽ¡‘$to–çdo“something“spAÇecial:‘:If“that“folloš¾9wing“c˜haracter“is“another“`f‘´q',‘ Êreplace“theŽ¡‘$t•¾9w“o–Ä~f‘´q's“bš¾9y“c˜haracter“coAÇde“Éoct"013"“¬[namely“` 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