<literal>\ClassError</literal> and <literal>\PackageError</literal> and others

Unofficial LaTeX2e reference manual · \cdot

\setlength{\leftmargini}{1.25em} % default 2.5em
+\begin{itemize}
+\item ...
+\end{itemize}
 
\begin{equation*}
+\begin{displaymath}
   \chi(x) =
   \left|              % vertical bar fence
     \begin{array}{ccc}
@@ -4860,7 +4859,7 @@
       -g   &-h  &x-i
     \end{array}
  \right|
-\end{equation*}
+\end{displaymath}
 
 
 The required argument cols describes the number of columns, their
@@ -5139,7 +5138,7 @@
 
 Environment to typeset the mathematical text on its own line, in
 display style and centered.  To make the text be flush-left use the
-global option fleqn; see Document class options.
+global option fleqn (Document class options).
 
 In the displaymath environment no equation number is added to the
 math text. One way to get an equation number is to use the
@@ -5150,11 +5149,21 @@
 package, amsmath
 amsmath package
 
-Note that the amsmath package has significantly more extensive
-displayed equation facilities.  For example, there are a number of
-ways in that package for having math text broken across lines.
+package, breqn
+breqn package
+
+environment, equation*
+equation* environment
+        
+The amsmath package defines an equation* environment
+which is functionally identical to displaymath but allows use
+of other amsmath facilities.  In general,
+amsmathhas significantly more extensive displayed equation
+facilities.  For example, there are a number of ways in that package
+for having math text broken across lines; see also the breqn
+package for that (https://ctan.org/pkg/breqn).
 
-\[...\] display math
+\[...\] display math
 The construct \[ math \] is a synonym for the environment
 \begin{displaymath} math \end{displaymath} but the
 latter is easier to work with in the source; for instance,
@@ -5161,13 +5170,12 @@
 searching for a square bracket may get false positives but the word
 displaymath will likely be unique.
 
-$$...$$ plain &tex; display math
-The construct $$math$$ from Plain &tex; is
-sometimes used as a synonym for &latex;&textrsquo;s displaymath.  It is
-not a synonym, and is not officially supported in &latex; at all;
-$$ doesn&textrsquo;t support the fleqn option (Document
-class options), has different vertical spacing, and doesn&textrsquo;t perform
-consistency checks.
+$$...$$ plain &tex; display math
+The construct $$math$$ from plain &tex; is sometimes
+used instead of &latex;&textrsquo;s displaymath.  Although the output is
+similar, but is not officially supported in &latex; at all; $$
+doesn&textrsquo;t support the fleqn option, has different vertical
+spacing, and doesn&textrsquo;t perform consistency checks.
 
 The output from this example is centered and alone on its line. 
 
@@ -5186,8 +5194,8 @@
 documentenumeratedisplaymathEnvironments
 document
 
-environment, document
-document environment
+environment, document
+document environment
         
 
 The document environment encloses the entire body of a document.
@@ -5202,8 +5210,8 @@
 \AtBeginDocument\AtEndDocumentdocument
 \AtBeginDocument
 
-\AtBeginDocument
-beginning of document hook
+\AtBeginDocument
+beginning of document hook
 
 Synopsis:
 
@@ -5225,8 +5233,8 @@
 \AtEndDocument\AtBeginDocumentdocument
 \AtEndDocument
 
-\AtEndDocument
-end of document hook
+\AtEndDocument
+end of document hook
 
 Synopsis:
 
@@ -5250,10 +5258,10 @@
 enumerateeqnarraydocumentEnvironments
 enumerate
 
-environment, enumerate
-enumerate environment
+environment, enumerate
+enumerate environment
         
-lists of items, numbered
+lists of items, numbered
 
 Synopsis:
 
@@ -5283,7 +5291,7 @@
 \end{enumerate}
 
\renewcommand{\labelenumi}{\textbf{\Alph{enumi}}}
 \begin{enumerate}
@@ -5353,15 +5361,15 @@
 eqnarrayequationenumerateEnvironments
 eqnarray
 
-environment, eqnarray
-eqnarray environment
+environment, eqnarray
+eqnarray environment
         
-equations, aligning
-aligning equations
+equations, aligning
+aligning equations
 
-align environment, from amsmath
-amsmath package, replacing eqnarray
-Madsen, Lars
+align environment, from amsmath
+amsmath package, replacing eqnarray
+Madsen, Lars
 The eqnarray environment is obsolete.  It has infelicities,
 including spacing that is inconsistent with other mathematics elements.
 (See &textldquo;Avoid eqnarray!&textrdquo;&noeos; by Lars Madsen
@@ -5390,7 +5398,7 @@
 \end{eqnarray*}
 
\begin{flushright}
@@ -5742,7 +5750,7 @@
 \end{flushright}
 
\begin{itemize}
@@ -5834,13 +5843,20 @@
 \end{itemize}
 
\usepackage[french]{babel} % changes list formatting!
+
\renewcommand{\labelitemi}{$\diamond$}
 
\setlength{\leftmargini}{1.25em} % default 2.5em
+\begin{itemize}
+\item ...
+\end{itemize}
 
% siunitx to have the S column specifier,
@@ -6604,11 +6626,11 @@
 picturequotation & quoteminipageEnvironments
 picture
 
-environment, picture
-picture environment
+environment, picture
+picture environment
         
-creating pictures
-pictures, creating
+creating pictures
+pictures, creating
 
 Synopses: 
 
@@ -6637,7 +6659,7 @@
 
 To start, here&textrsquo;s an example showing the parallelogram law for adding vectors.
 
-\unitlength
+\unitlength
 
 \setlength{\unitlength}{1cm}
 \begin{picture}(6,6)      % picture box will be 6cm wide by 6cm tall
@@ -6681,7 +6703,7 @@
 picture by shifting everything, you can just add the appropriate
 optional argument.
 
-position, in picture
+position, in picture
 Each picture command tells &latex; where to put something by
 providing its position.  A position is a pair such as (2.4,-5)
 giving the x- and y-coordinates.  A coordinate is a not a length,
@@ -6717,7 +6739,7 @@
 places the object with its reference point at coordinates
  $(11.3,-0.3)$ .  The reference points for various objects will be
 described below.
-LR box
+LR box
 The \put command creates an LR box (Modes).
 Anything that can go in an \mbox (\mbox & \makebox) can
 go in the text argument of the \put command.  The reference point
@@ -6784,7 +6806,7 @@
 \put\multiputpicture
 \put
 
-\put
+\put
 
 Synopsis:
 
@@ -6811,7 +6833,7 @@
 \multiput\qbezier\putpicture
 \multiput
 
-\multiput
+\multiput
 
 Synopsis:
 
@@ -6842,7 +6864,7 @@
 \qbezier\graphpaper\multiputpicture
 \qbezier
 
-\qbezier
+\qbezier
 
 Synopsis:
 
@@ -6894,7 +6916,7 @@
 \graphpaper\line\qbezierpicture
 \graphpaper
 
-\graphpaper
+\graphpaper
 Synopsis:
 
 
@@ -6902,8 +6924,8 @@
 \graphpaper[spacing](x_init,y_init)(x_dimen,y_dimen)
 
 
-package, graphpap
-graphpap package
+package, graphpap
+graphpap package
 
 Draw a coordinate grid.  Requires the graphpap package.
 The grid&textrsquo;s origin is (x_init,y_init).
@@ -6929,7 +6951,7 @@
 \line\linethickness\graphpaperpicture
 \line
 
-\line
+\line
 
 Synopsis:
 
@@ -6969,21 +6991,21 @@
 If travel is negative then you get LaTeX Error: Bad \line or
 \vector argument.
 
-graphics packages
-package, pict2e
-pict2e package
+graphics packages
+package, pict2e
+pict2e package
 
-package, TikZ
-TikZ package
+package, TikZ
+TikZ package
 
-package, PSTricks
-PSTricks package
+package, PSTricks
+PSTricks package
 
-package, MetaPost
-MetaPost package
+package, MetaPost
+MetaPost package
 
-package, Asymptote
-Asymptote package
+package, Asymptote
+Asymptote package
 
 Standard &latex; can only draw lines with a limited range of slopes
 because these lines are made by putting together line segments from
@@ -7003,7 +7025,7 @@
 \linethickness\thinlines\linepicture
 \linethickness
 
-\linethickness
+\linethickness
 
 Synopsis:
 
@@ -7022,7 +7044,7 @@
 \thinlines\thicklines\linethicknesspicture
 \thinlines
 
-\thinlines
+\thinlines
 
 Declaration to set the thickness of subsequent lines, circles, and ovals
 in a picture environment to be 0.4pt.  This is the default
@@ -7034,7 +7056,7 @@
 \thicklines\circle\thinlinespicture
 \thicklines
 
-\thicklines
+\thicklines
 
 Declaration to set the thickness of subsequent lines, circles, and ovals
 in a picture environment to be 0.8pt.  See also
@@ -7046,7 +7068,7 @@
 \circle\oval\thicklinespicture
 \circle
 
-\circle
+\circle
 
 Synopsis:
 
@@ -7073,7 +7095,7 @@
 \oval\shortstack\circlepicture
 \oval
 
-\oval
+\oval
 
 Synopsis:
 
@@ -7121,7 +7143,7 @@
 \shortstack\vector\ovalpicture
 \shortstack
 
-\shortstack
+\shortstack
 
 Synopsis:
 
@@ -7160,7 +7182,7 @@
 Center objects (default)
 
 
-\\ (for \shortstack objects)
+\\ (for \shortstack objects)
 Separate objects into lines with \\.  These stacks are short in
 that, unlike in a tabular or array environment, here the
 rows are not spaced out to be of even baseline skips.  Thus, in
@@ -7181,7 +7203,7 @@
 \vector\makebox (picture)\shortstackpicture
 \vector
 
-\vector
+\vector
 
 Synopsis:
 
@@ -7210,7 +7232,7 @@
 \makebox (picture)\framebox (picture)\vectorpicture
 \makebox (picture)
 
-\makebox (for picture)
+\makebox (for picture)
 
 Synopsis:
 
@@ -7259,7 +7281,7 @@
 \framebox (picture)\frame\makebox (picture)picture
 \framebox (picture)
 
-\framebox
+\framebox
 
 Synopsis:
 
@@ -7291,8 +7313,8 @@
 text; see \makebox (picture) for the values that it can
 take.
 
-\fboxrule
-\fboxsep
+\fboxrule
+\fboxsep
 The rule has thickness \fboxrule and there is a blank space
 \fboxsep between the frame and the contents of the box.
 
@@ -7306,7 +7328,7 @@
 \frame\dashbox\framebox (picture)picture
 \frame
 
-\frame
+\frame
 
 Synopsis:
 
@@ -7325,7 +7347,7 @@
 \dashbox\framepicture
 \dashbox
 
-\dashbox
+\dashbox
 
 Synopsis:
 
@@ -7367,19 +7389,19 @@
 quotation & quote
 
 quotation
-environment, quotation
-quotation environment
+environment, quotation
+quotation environment
         
-quoted text with paragraph indentation, displaying
-displaying quoted text with paragraph indentation
-paragraph indentations in quoted text
+quoted text with paragraph indentation, displaying
+displaying quoted text with paragraph indentation
+paragraph indentations in quoted text
 quote
-environment, quote
-quote environment
+environment, quote
+quote environment
         
-quoted text without paragraph indentation, displaying
-displaying quoted text without paragraph indentation
-paragraph indentations in quoted text, omitting
+quoted text without paragraph indentation, displaying
+displaying quoted text without paragraph indentation
+paragraph indentations in quoted text, omitting
 
 Synopsis:
 
@@ -7422,12 +7444,12 @@
 
 
 
-environment, tabbing
-tabbing environment
+environment, tabbing
+tabbing environment
         
-tab stops, using
-lining text up using tab stops
-alignment via tabbing
+tab stops, using
+lining text up using tab stops
+alignment via tabbing
 
 Synopsis:
 
@@ -7475,7 +7497,7 @@
 the end of line, so that the width of the environment is
 \linewidth.
 
-row, tabbing
+row, tabbing
 The tabbing environment contains a sequence of tabbed
 rows.  The first tabbed row begins immediately after
 \begin{tabbing} and each row ends with \\ or
@@ -7482,7 +7504,7 @@
 \kill. The last row may omit the \\ and end with just
 \end{tabbing}.
 
-pattern, current tab stops, tabbing
+pattern, current tab stops, tabbing
 At any point the tabbing environment has a current tab stop
 pattern, a sequence of n > 0 tab stops, numbered 0, 1,
 etc.  These create n corresponding columns.  Tab stop 0 is
@@ -7500,37 +7522,37 @@
 They are all fragile (\protect).
 
 
-\\ (tabbing)\\ (tabbing)
+\\ (tabbing)\\ (tabbing)
 End a tabbed line and typeset it.
 
-\= (tabbing)\= (tabbing)
+\= (tabbing)\= (tabbing)
 Sets a tab stop at the current position.
 
-\> (tabbing)\> (tabbing)
-\>
+\> (tabbing)\> (tabbing)
+\>
 Advances to the next tab stop.
 
-\<\<
+\<\<
 Put following text to the left of the local margin (without changing
 the margin).  Can only be used at the start of the line.
 
-\+\+
+\+\+
 Moves the left margin of the next and all the
 following commands one tab stop to the right, beginning tabbed line if
 necessary.
 
-\-\-
+\-\-
 Moves the left margin of the next and all the
 following commands one tab stop to the left, beginning tabbed line if
 necessary.
 
-\' (tabbing)\' (tabbing)
+\' (tabbing)\' (tabbing)
 Moves everything that you have typed so far in the current column, i.e.,
 everything from the most recent \>, \<, \',
 \\, or \kill command, to the previous column and aligned
 to the right, flush against the current column&textrsquo;s tab stop.
 
-\` (tabbing)\` (tabbing)
+\` (tabbing)\` (tabbing)
 Allows you to put text flush right against any tab stop, including tab
 stop 0.  However, it can&textrsquo;t move text to the right of the last
 column because there&textrsquo;s no tab stop there.  The \` command moves
@@ -7540,29 +7562,29 @@
 \' command between the \` and the \\ or
 \end{tabbing} command that ends the line.
 
-\a (tabbing)\a (tabbing)
-\a' (acute accent in tabbing)
-\a` (grave accent in tabbing)
-\a= (macron accent in tabbing)
+\a (tabbing)\a (tabbing)
+\a' (acute accent in tabbing)
+\a` (grave accent in tabbing)
+\a= (macron accent in tabbing)
 In a tabbing environment, the commands \=, \' and
 \` do not produce accents as usual (Accents).  Instead,
 use the commands \a=, \a' and \a`.
 
-\kill\kill
+\kill\kill
 Sets tab stops without producing text.  Works just like \\ except
 that it throws away the current line instead of producing output for it.
 Any \=, \+ or \- commands in that line remain in
 effect.
 
-\poptabs\poptabs
-\poptabs
+\poptabs\poptabs
+\poptabs
 Restores the tab stop positions saved by the last \pushtabs.
 
-\pushtabs\pushtabs
+\pushtabs\pushtabs
 Saves all current tab stop positions. Useful for temporarily changing
 tab stop positions in the middle of a tabbing environment.
 
-\tabbingsep\tabbingsep
+\tabbingsep\tabbingsep
 Distance of the text moved by \' to left of current tab stop.
 
 
@@ -7594,17 +7616,17 @@
          end;
 
The command's first argument is \verb*!filename with extension! and ...
 
\cprotect\caption{This \verb|\command| is ok with \verb|\cprotect|.}
 
 
 
-
+
 
 
 
@@ -11128,8 +11150,8 @@
 
 \AtBeginDvi
 \AtEndDvi
-\AtBeginDvi
-\AtEndDvi
+\AtBeginDvi
+\AtEndDvi
 
 Synopsis:
 
@@ -11144,8 +11166,8 @@
 the shipout/firstpage hook; new code should use that hook
 directly.
 
-package, atenddvi
-atenddvi package
+package, atenddvi
+atenddvi package
 
 Similarly, \AtEndDvi (previously available only with the
 atenddvi package) is code executed when finalizing the main
@@ -11158,8 +11180,8 @@
 
 \AtEndOfClass
 \AtEndOfPackage
-\AtEndOfClass
-\AtEndOfPackage
+\AtEndOfClass
+\AtEndOfPackage
 
 Synopses:
 
@@ -11179,13 +11201,13 @@
 
 
 
-\CheckCommand\ClassError and \PackageError and others\AtEndOfClass & \AtEndOfPackageClass and package commands
+\CheckCommand\ClassError and \PackageError and other messages\AtEndOfClass & \AtEndOfPackageClass and package commands
 \CheckCommand
 
-\CheckCommand
-new command, checking definition of
-long command
-\long command, checking for
+\CheckCommand
+new command, checking definition of
+long command
+\long command, checking for
 
 Synopsis:
 
@@ -11210,19 +11232,22 @@
 
 
 
-\ClassError and \PackageError and others\CurrentOption\CheckCommandClass and package commands
-\ClassError and \PackageError and others
+\ClassError and \PackageError and other messages\CurrentOption\CheckCommandClass and package commands
+\ClassError and \PackageError and other messages
 
+\ClassError and \PackageError and others
 \ClassError
 \ClassWarning
 \ClassWarningNoLine
+\ClassNote
+\ClassNoteNoLine
 \ClassInfo
-\ClassInfoNoLine
 \PackageError
 \PackageWarning
 \PackageWarningNoLine
+\PackageNote
+\PackageNoteNoLine
 \PackageInfo
-\PackageInfoNoLine
 
 Produce error, warning, and informational messages for classes:
 
@@ -11230,13 +11255,15 @@
 \ClassError{class name}{error-text}{help-text}
 \ClassWarning{class name}{warning-text}
 \ClassWarningNoLine{class name}{warning-text}
-\ClassInfo{class name}{info-text}
-\ClassInfoNoLine{class name}{info-text}
-\ClassError
-\ClassWarning
-\ClassWarningNoLine
-\ClassInfo
-\ClassInfoNoLine
+\ClassNote{class name}{note-text}
+\ClassNoteNoLine{class name}{note-text}
+\ClassInfo{class name}{log-text}
+\ClassError
+\ClassWarning
+\ClassWarningNoLine
+\ClassNote
+\ClassNoteNoLine
+\ClassInfo
 
 
  and the same for packages:
@@ -11244,43 +11271,51 @@
 \PackageError{package name}{error-text}{help-text}
 \PackageWarning{package name}{warning-text}
 \PackageWarningNoLine{package name}{warning-text}
-\PackageInfo{package name}{info-text}
-\PackageInfoNoLine{package name}{info-text}
-\PackageError
-\PackageWarning
-\PackageWarningNoLine
-\PackageInfo
-\PackageInfoNoLine
+\PackageNote{package name}{note-text}
+\PackageNoteNoLine{package name}{note-text}
+\PackageInfo{package name}{log-text}
+\PackageError
+\PackageWarning
+\PackageWarningNoLine
+\PackageNote
+\PackageNoteNoLine
+\PackageInfo
 
 
 For \ClassError and \PackageError the message is
 error-text, followed by &tex;&textrsquo;s &textlsquo;?&textrsquo; error prompt. If the
-user then asks for help by typing h, they see the help
-text.
+user then asks for help by typing h, they see help-text.
 
-The four Warning commands are similar except that they write
-warning-text on the screen with no error prompt.  The four
-Info commands write info-text only in the transcript
-file.  The NoLine versions omit the number of the line
+The four Warning commands write warning-text on the
+terminal and log file (with no error prompt), prefixed by the text
+Warning:.
+
+
+The four Note commands also write the note-text to the
+terminal and log file, without the Warning: prefix.
+
+The NoLine versions omit the number of the input line
 generating the message, while the other versions do show that number.
 
-\protect, and message text
-\space, and message text
-\MessageBreak, and message text
+The two Info commands write log-text only in the
+transcript file and not to the terminal.
+
+\protect, and message text
+\space, and message text
+\MessageBreak, and message text
 To format the messages, including the help-text: use
 \protect to stop a command from expanding, get a line break
-with \MessageBreak, and get a space with \space when a
-space character is ignore, most commonly after a command.
+with \MessageBreak, and get a space with \space where a
+space character is ignored, most commonly after a command.
 
 &latex; appends a period to the messages.
 
-
 
-\CurrentOption\DeclareOption\ClassError and \PackageError and othersClass and package commands
+\CurrentOption\DeclareOption\ClassError and \PackageError and other messagesClass and package commands
 \CurrentOption
 
-\CurrentOption
-option, currently being processed
+\CurrentOption
+option, currently being processed
 
 Expands to the name of the option currently being processed.  This can
 only be used within the code argument of either
@@ -11291,11 +11326,11 @@
 \DeclareOption\DeclareRobustCommand\CurrentOptionClass and package commands
 \DeclareOption
 
-\DeclareOption
-class options
-package options
-options, class
-options, package
+\DeclareOption
+class options
+package options
+options, class
+options, package
 
 Synopsis:
 
@@ -11312,9 +11347,9 @@
 must contain \DeclareOption{logo}{code} (and later,
 \ProcessOptions).
 
-default option processing
-option processing by default
-Unused global option warning, handling
+default option processing
+option processing by default
+Unused global option warning, handling
 If you request an option that has not been declared, by default this
 will produce a warning like Unused global option(s):
 [badoption].  This can be changed by using
@@ -11349,9 +11384,9 @@
 \DeclareRobustCommand\ExecuteOptions\DeclareOptionClass and package commands
 \DeclareRobustCommand
 
-\DeclareRobustCommand
-new command, definition
-robust command, defining
+\DeclareRobustCommand
+new command, definition
+robust command, defining
 
 Synopsis:
 
@@ -11382,13 +11417,13 @@
 using \newcommand so unless the command&textrsquo;s data is fragile and the
 command is used within a moving argument, use \newcommand.
 
-package, etoolbox
-etoolbox package
+package, etoolbox
+etoolbox package
 
-e-&tex;, and robust commands
-\newrobustcmd (etoolbox package)
-\renewrobustcmd (etoolbox package)
-\providerobustcmd (etoolbox package)
+e-&tex;, and robust commands
+\newrobustcmd (etoolbox package)
+\renewrobustcmd (etoolbox package)
+\providerobustcmd (etoolbox package)
 
 Related to this, the etoolbox package offers three commands
 and their starred forms: \newrobustcmd(*)
@@ -11418,7 +11453,7 @@
 \ExecuteOptions\IfFileExists & \InputIfFileExists\DeclareRobustCommandClass and package commands
 \ExecuteOptions
 
-\ExecuteOptions
+\ExecuteOptions
 
 Synopsis:
 
@@ -11426,7 +11461,7 @@
 \ExecuteOptions{option-list}
 
 
-\ds&arobase;option
+\ds&arobase;option
 For each option option in option-list, in order, this
 command executes the command \ds&arobase;option.  If this
 command is not defined then that option is silently ignored.
@@ -11443,8 +11478,8 @@
 
 \IfFileExists
 \InputIfFileExists
-\IfFileExists
-\InputIfFileExists
+\IfFileExists
+\InputIfFileExists
 
 Synopses:
 
@@ -11494,8 +11529,8 @@
 
 \LoadClass
 \LoadClassWithOptions
-\LoadClass
-\LoadClassWithOptions
+\LoadClass
+\LoadClassWithOptions
 
 Synopses:
 
@@ -11525,7 +11560,7 @@
 Standard LaTeX document class' is available.
 
part            paragraph       figure          enumi
 chapter         subparagraph    table           enumii
@@ -11912,7 +11947,7 @@
 \alph \Alph \arabic \roman \Roman \fnsymbol\usecounterCounters
 \alph \Alph \arabic \roman \Roman \fnsymbol: Printing counters
 
-counters, printing
+counters, printing
 
 Print the value of a counter, in a specified style.  For instance, if
 the counter counter has the value 1 then a
@@ -11924,30 +11959,30 @@
 start with a backslash.
 
 
-\alph{counter}\alph{counter}
+\alph{counter}\alph{counter}
 Print the value of counter in lowercase letters: &textlsquo;a&textrsquo;, &textlsquo;b&textrsquo;,
 &enddots; If the counter&textrsquo;s value is less than 1 or more than 26 then
 you get LaTeX Error: Counter too large.
 
-\Alph{counter}\Alph{counter}
+\Alph{counter}\Alph{counter}
 Print in uppercase letters: &textlsquo;A&textrsquo;, &textlsquo;B&textrsquo;, &enddots; If the counter&textrsquo;s value
 is less than 1 or more than 26 then you get LaTeX Error: Counter
 too large.
 
-\arabic{counter}\arabic{counter}
+\arabic{counter}\arabic{counter}
 Print in Arabic numbers such as 5 or -2.
 
-\roman{counter}\roman{counter}
+\roman{counter}\roman{counter}
 Print in lowercase roman numerals: &textlsquo;i&textrsquo;, &textlsquo;ii&textrsquo;, &enddots; If the
 counter&textrsquo;s value is less than 1 then you get no warning or error but
 &latex; does not print anything in the output.
 
-\Roman{counter}\Roman{counter}
+\Roman{counter}\Roman{counter}
 Print in uppercase roman numerals: &textlsquo;I&textrsquo;, &textlsquo;II&textrsquo;, &enddots; If the
 counter&textrsquo;s value is less than 1 then you get no warning or error but
 &latex; does not print anything in the output.
 
-\fnsymbol{counter}\fnsymbol{counter}
+\fnsymbol{counter}\fnsymbol{counter}
 Prints the value of counter using a sequence of nine symbols that
 are traditionally used for labeling footnotes.  The value of
 counter should be between 1 and 9, inclusive.  If the
@@ -11988,9 +12023,9 @@
 \usecounter\value\alph \Alph \arabic \roman \Roman \fnsymbolCounters
 \usecounter
 
-\usecounter
-list items, specifying counter
-numbered items, specifying counter
+\usecounter
+list items, specifying counter
+numbered items, specifying counter
 
 Synopsis:
 
@@ -12025,8 +12060,8 @@
 \value\setcounter\usecounterCounters
 \value
 
-\value
-counters, getting value of
+\value
+counters, getting value of
 
 Synopsis:
 
@@ -12069,9 +12104,9 @@
 \setcounter\addtocounter\valueCounters
 \setcounter
 
-\setcounter
-counters, setting
-setting counters
+\setcounter
+counters, setting
+setting counters
 
 Synopsis:
 
@@ -12097,7 +12132,7 @@
 \addtocounter\refstepcounter\setcounterCounters
 \addtocounter
 
-\addtocounter
+\addtocounter
 
 Synopsis:
 
@@ -12121,7 +12156,7 @@
 \refstepcounter\stepcounter\addtocounterCounters
 \refstepcounter
 
-\refstepcounter
+\refstepcounter
 
 Synopsis:
 
@@ -12145,7 +12180,7 @@
 \stepcounter\day & \month & \year\refstepcounterCounters
 \stepcounter
 
-\stepcounter
+\stepcounter
 
 Synopsis:
 
@@ -12170,9 +12205,9 @@
 \day
 \month
 \year
-\day
-\month
-\year
+\day
+\month
+\year
 
 &latex; defines the counter \day for the day of the month
 (nominally with value between 1 and 31), \month for the month of
@@ -12201,16 +12236,16 @@
 LengthsMaking paragraphsCountersTop
 Lengths
 
-lengths, defining and using
+lengths, defining and using
 
 A length is a measure of distance.  Many &latex; commands take a
 length as an argument.
 
-rigid lengths
-rubber lengths
-dimen plain &tex;
-skip plain &tex;
-glue plain &tex;
+rigid lengths
+rubber lengths
+dimen plain &tex;
+skip plain &tex;
+glue plain &tex;
 Lengths come in two types.  A rigid length such as 10pt
 does not contain a plus or minus component.  (Plain
 &tex; calls this a dimen.)  A rubber length (what plain
@@ -12338,57 +12373,57 @@
 Units of length\setlengthLengths
 Units of length
 
-units, of length
+units, of length
 
 &tex; and &latex; know about these units both inside and outside of
 math mode.
 
 
-ptpt 
-point
+ptpt 
+point
 units of length pt
 Point, 1/72.27 inch.  The (approximate) conversion to metric units
 is 1point = .35146mm = .035146cm. 
 
-pcpc
-pica
+pcpc
+pica
 units of length pc
 Pica, 12 pt
 
-inin 
-inch
+inin 
+inch
 units of length in
 Inch, 72.27 pt
 
-bpbp 
-big point
-PostScript point
+bpbp 
+big point
+PostScript point
 units of length bp
 Big point, 1/72 inch.  This length is the definition of a point in
 PostScript and many desktop publishing systems.
 
-mmmm 
-millimeter
+mmmm 
+millimeter
 units of length mm
 Millimeter, 2.845pt
 
-cmcm 
-centimeter
+cmcm 
+centimeter
 units of length cm
 Centimeter, 10mm
 
-dddd 
-didot point
+dddd 
+didot point
 units of length dd
 Didot point, 1.07 pt
 
-cccc 
-cicero
+cccc 
+cicero
 units of length cc
 Cicero, 12 dd
 
-spsp 
-scaled point
+spsp 
+scaled point
 units of length sp
 Scaled point, 1/65536 pt
 
@@ -12398,9 +12433,9 @@
 than being an absolute dimension.
 
 
-exex
-x-height
-ex
+exex
+x-height
+ex
 Lengths/ex
 units of length ex
 The x-height of the current font ex, traditionally the
@@ -12407,9 +12442,9 @@
 height of the lowercase letter x, is often used for vertical
 lengths.
 
-emem
-m-width
-em
+emem
+m-width
+em
 Lengths/em
 units of length em
 Similarly em, traditionally the width of the capital
@@ -12418,8 +12453,8 @@
 have 1em = 10pt.  &latex; has several commands to produce
 horizontal spaces based on the em (\enspace & \quad & \qquad).
 
-mumu
-mu, math unit
+mumu
+mu, math unit
 units of length mu
 Finally, in math mode, many definitions are expressed in terms
 of the math unit mu, defined by 1em = 18mu, where the
@@ -12438,8 +12473,8 @@
 \setlength\addtolengthUnits of lengthLengths
 \setlength
 
-\setlength
-lengths, setting
+\setlength
+lengths, setting
 
 Synopsis:
 
@@ -12475,8 +12510,8 @@
 \addtolength\settodepth\setlengthLengths
 \addtolength
 
-\addtolength
-lengths, adding to
+\addtolength
+lengths, adding to
 
 Synopsis:
 
@@ -12519,7 +12554,7 @@
 \settodepth\settoheight\addtolengthLengths
 \settodepth
 
-\settodepth
+\settodepth
 
 Synopsis:
 
@@ -12552,7 +12587,7 @@
 \settoheight\settowidth\settodepthLengths
 \settoheight
 
-\settoheight
+\settoheight
 
 Synopsis:
 
@@ -12586,7 +12621,7 @@
 \settowidth\stretch\settoheightLengths
 \settowidth
 
-\settowidth
+\settowidth
 
 Synopsis:
 
@@ -12620,7 +12655,7 @@
 \stretchExpressions\settowidthLengths
 \stretch
 
-\stretch
+\stretch
 
 Synopsis:
 
@@ -12667,7 +12702,7 @@
 Expressions\stretchLengths
 Expressions
 
-expressions
+expressions
 
 
 Synopsis, one of:
@@ -12779,8 +12814,8 @@
 Making paragraphsMath formulasLengthsTop
 Making paragraphs
 
-making paragraphs
-paragraphs
+making paragraphs
+paragraphs
 
 To start a paragraph, just type some text.  To end the current
 paragraph, put an empty line.  This is three paragraphs, the
@@ -12863,8 +12898,8 @@
 \par\indent & \noindentMaking paragraphs
 \par
 
-\par
-paragraph, ending
+\par
+paragraph, ending
 
 Synopsis (note that while reading the input &tex; converts any sequence
 of one or more blank lines to a \par, Making paragraphs):
@@ -12930,9 +12965,9 @@
 
 \indent
 \noindent
-\indent
-\noindent
-indent, forcing
+\indent
+\noindent
+indent, forcing
 
 Synopsis:
 
@@ -12980,14 +13015,14 @@
 \noindent shows this clearly.
 
\unboldmath \( math \)
 
With side ratios \( 3:4 \) and \( 4:5 \), the triangle is right.
 
\noindent Name:\hfill Quiz One
 
\spacefactor=integer
 
capital-letter\&arobase;.    
 
before~after
 
.pdf,.png,.jpg,.mps,.jpeg,.jbig2,.jb2,.PDF,.PNG,.JPG,.JPEG,.JBIG2,.JB2
 
\newcommand{\qedsymbol}{\rule{0.4em}{2ex}}
 
\documentclass{book}
 \includeonly{
@@ -20721,7 +20755,7 @@
 \end{document}
 
\input{"amo\space amas\space amat"}
 
\addcontentsline{ext}{unit}{text}
 
\begin{theindex}
@@ -21462,10 +21496,10 @@
 in most cases automated methods such as makeindex are best.
 Indexes.
 
-\item
-\subitem
-\subsubitem
-\indexspace
+\item
+\subitem
+\subsubitem
+\indexspace
 However we cover the commands for completeness, and because the
 automated methods are based on these commands.  There are three levels
 of entries.  As the example shows, a main entry uses \item,
@@ -21480,8 +21514,8 @@
 \indexmakeindexProduce the index manuallyIndexes
 \index
 
-index entry
-\index
+index entry
+\index
 
 Synopsis:
 
@@ -21507,7 +21541,7 @@
 rate of growth\index{Ackermann!function!growth rate}
 
\wlog{Parallel lines have a lot in common.^^JBut they never meet.}
 

12.14.4 \ClassError and \PackageError and others ¶

12.14.4 `\ClassError` and `\PackageError` and others ¶