diff --git a/doc/latex/code.sty b/doc/latex/code.sty
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-% code.sty: -*- latex -*-
-% Latex macros for a "weak" verbatim mode.
-% -- like verbatim, except \, {, and } have their usual meanings.
-
-% Environments: code, tightcode,  codeaux, codebox, centercode
-% Commands: \dcd, \cddollar, \cdmath, \cd, \codeallowbreaks, \codeskip, \^
-% Already defined in LaTeX, but of some relevance: \#, \$, \%, \&, \_, \{, \}
-
-% Changelog at the end of the file.
-
-% These commands give you an environment, code, that is like verbatim
-% except that you can still insert commands in the middle of the environment:
-%     \begin{code}
-%     for(x=1; x<loop_bound; x++)
-%         y += x^3; /* {\em Add in {\tt x} cubed} */
-%     \end{code}
-%
-% All characters are ordinary except \{}. To get \{} in your text, 
-% you use the commands \\, \{, and \}.
-
-% These macros mess with the definition of the special chars (e.g., ^_~%).
-% The characters \{} are left alone, so you can still have embedded commands:
-%	\begin{code} f(a,b,\ldots,y,z) \end{code}
-% However, if your embedded commands use the formerly-special chars, as in
-%    	\begin{code} x := x+1 /* \mbox{\em This is $y^3$} */ \end{code}
-% then you lose. The $ and ^ chars are scanned in as non-specials,
-% so they don't work. If the chars are scanned *outside* the code env,
-% then you have no problem:
-% 	\def\ycube{$y^3$}
-% 	\begin{code} x := x+1 /* {\em This is \ycube} */ \end{code}
-% If you must put special chars inside the code env, you do it by
-% prefixing them with the special \dcd ("decode") command, that
-% reverts the chars to back to special status:
-%    	\begin{code} x := x+1 /* {\dcd\em This is $y^3$} */ \end{code}
-% \dcd's scope is bounded by its enclosing braces. It is only defined within
-% the code env. You can also turn on just $ with the \cddollar command;
-% you can turn on just $^_ with the \cdmath command. See below.
-%
-% Alternatively, just use \(...\) for $...$, \sp for ^, and \sb for _.
-
-% WARNING:
-% Like \verb, you cannot put a \cd{...} inside an argument to a macro
-% or a command. If you try, for example,
-%     \mbox{\cd{$x^y$}}
-% you will lose. That is because the text "\cd{$x^y$}" gets read in
-% as \mbox's argument before the \cd executes. But the \cd has to
-% have a chance to run before LaTeX ever reads the $x^y$ so it can
-% turn off the specialness of $ and ^. So, \cd has to appear at
-% top level, not inside an argument. Similarly, you can't have
-% a \cd or a \code inside a macro (Although you could use \gdef to
-% define a macro *inside* a \cd, which you could then use outside.
-% Don't worry about this if you don't understand it.)
-
-% BUG: In the codebox env, the effect of a \dcd, \cddollar, or \cdmath
-%   command is reset at the end of each line. This can be hacked by
-%   messing with the \halign's preamble, if you feel up to it.
-
-% Useage note: the initial newline after the \begin{code} or 
-%   \begin{codebox} is eaten, but the last newline is not.
-%   So,
-%     \begin{code}
-%     foo
-%     bar
-%     \end{code}
-%  leaves one more blank line after bar than does
-%     \begin{code}
-%     foo
-%     bar\end{code}
-%  Moral: get in the habit of terminating code envs without a newline
-%  (as in the second example).
-%
-
-% All this stuff tweaks the meaning of space, tab, and newline.
-%===============================================================================
-% \cd@obeyspaces
-% Turns all spaces into non-breakable spaces.
-% Note: this is like \@vobeyspaces except without spurious space in defn.
-% @xobeysp is basically a space; it's defined in latex.tex.
-%
-{\catcode`\ =\active\gdef\cd@obeyspaces{\catcode`\ =\active\let =\@xobeysp}}
-
-
-
-% \cd@obeytabs
-% Turns all tabs into 8 non-breakable spaces (which is bogus).
-%
-{\catcode`\^^I=\active %
-  \gdef\cd@obeytabs{\catcode`\^^I=\active\let^^I=\cd@tab}}
-
-\def\cd@tab{\@xobeysp\@xobeysp\@xobeysp\@xobeysp\@xobeysp\@xobeysp\@xobeysp\@xobeysp}
-
-
-
-% \cd@obeylines
-% Turns all cr's into linebreaks. Pagebreaks are not permitted between lines.
-% This is copied from lplain.tex's \obeylines, with the cr def'n changed.
-%
-{\catcode`\^^M=\active % these lines must end with %
-  \gdef\cd@obeylines{\catcode`\^^M=\active\let^^M=\cd@cr}}
-
-% What ^M turns into. This def'n keeps blank lines from being compressed out.
-\def\cd@cr{\par\penalty10000\leavevmode} 	% TeX magicness
-%\def\cd@cr{\par\penalty10000\mbox{}}		% LaTeX
-
-
-% \codeallowbreaks
-% Same as \cd@obeylines, except pagebreaks are allowed.
-% Put this command inside a code env to allow pagebreaks.
-
-{\catcode`\^^M=\active % these lines must end with %
-  \gdef\codeallowbreaks{\catcode`\^^M\active\let^^M\cd@crbr}}
-
-%\def\cd@crbr{\leavevmode\endgraf} % What ^M turns into.
-\def\cd@crbr{\par\leavevmode} % What ^M turns into.
-
-
-% \cd@obeycrsp 
-% Turns cr's into non-breakable spaces. Used by \cd.
-
-{\catcode`\^^M=\active % these lines must end with %
-  \gdef\cd@obeycrsp{\catcode`\^^M=\active\let^^M=\@xobeysp}}
-
-% =============================================================================
-
-% Set up code environment, in which most of the common special characters
-% appearing in code are treated verbatim, namely: $&#^_~%
-% \ { } are still enabled so that macros can be called in this
-% environment.  Use \\, \{, and \} to use these characters verbatim
-% in this environment.
-% 
-% Inside a group, you can make
-% all the hacked chars	special with the	\dcd		command
-% $			special with the 	\cddollar	command
-% $^_			special with the	\cdmath		command.
-% If you have a bunch of math $..$'s in your code env, then a global \cddollar
-% or \cdmath at the beginning of the env can save a lot of trouble.
-% When chars are special (e.g., after a \dcd), you can still get #$%&_{} with
-% \#, \$, \%, \&, \_, \{, and \} -- this is standard LaTeX.
-% Additionally, \\ gives \ inside the code env, and when \cdmath
-% makes ^ special, it also defines \^ to give ^.
-
-%The hacked characters can be made special again
-% within a group by using the \dcd command.
-
-% Note: this environment allows no breaking of lines whatsoever; not
-% at spaces or hypens.  To arrange for a break use the standard \- command,
-% or a \discretionary{}{}{} which breaks, but inserts nothing.  This is useful,
-% for example for allowing hypenated identifiers to be broken, e.g.
-% \def\={\discretionary{}{}{}} %optional break
-% FOO-\=BAR.
-
-\def\setupcode{\parsep=0pt\parindent=0pt%
-  \normalfont\ttfamily\frenchspacing\catcode``=13\@noligs%
-  \def\\{\char`\\}%
-  \let\dcd=\cd@dcd\let\cddollar=\cd@dollarspecial\let\cdmath=\cd@mathspecial%
-  \@makeother\$\@makeother\&\@makeother\#%
-  \@makeother\^\@makeother\_\@makeother\~%
-  \@makeother\%\cd@obeytabs\cd@obeyspaces}
-% other: $&#^_~%
-% left special: \{}
-% unnecessary: @`'"
-
-
-%% codebox, centercode
-%%=============================================================================
-%% The codebox env makes a box exactly as wide as it needs to be
-%% (i.e., as wide as the longest line of code is). This is useful
-%% if you want to center a chunk of code, or flush it right, or
-%% something like that. The optional argument to the environment,
-%% [t], [c], or [b], specifies how to vertically align the codebox,
-%% just as with arrays or other boxes. Default is [c].
-
-%% Must be a newline immediately after "\begin{codebox}[t]"!
-
-{\catcode`\^^M=\active % these lines must end with %
-  \gdef\cd@obeycr{\catcode`\^^M=\active\let^^M=\cr}}
-
-% If there is a [<letter>] option, then the following newline will
-% be read *after* ^M is bound to \cr, so we're cool. If there isn't
-% an option given (i.e., default to [c]), then the @\ifnextchar will
-% gobble up the newline as it gobbles whitespace. So we insert the
-% \cr explicitly. Isn't TeX fun?
-\def\codebox{\leavevmode\@ifnextchar[{\@codebox}{\@codebox[c]\cr}} %]
-
-\def\@codebox[#1]%
-  {\hbox\bgroup$\if #1t\vtop \else \if#1b\vbox \else \vcenter \fi\fi\bgroup%
-   \tabskip\z@\setupcode\cd@obeycr% just before cd@obey
-   \halign\bgroup##\hfil\span}
-
-\def\endcodebox{\crcr\egroup\egroup\m@th$\egroup}
-
-% Center the box on the page:
-\newenvironment{centercode}%
-  {\begin{center}\begin{codebox}[c]}%
-  {\end{codebox}\end{center}}
-
-
-%% code, codeaux, tightcode
-%%=============================================================================
-%% Code environment as described above. Lines are kept on one page.
-%% This actually works by setting a huge penalty for breaking
-%% between lines of code. Code is indented same as other displayed paras.
-%% Note: to increase left margin, use \begin{codeaux}{\leftmargin=1in}.
-
-% To allow pagebreaks, say \codeallowbreaks immediately inside the env.
-% You can allow breaks at specific lines with a \pagebreak form.
-
-%% N.B.: The \global\@ignoretrue command must be performed just inside
-%% the *last* \end{...} before the following text. If not, you will
-%% get an extra space on the following line. Blech.
-
-%% This environment takes two arguments. 
-%% The second, required argument is the \list parameters to override the
-%%     \@listi... defaults.
-%%     - Usefully set by clients: \topsep \leftmargin
-%%     - Possible, but less useful: \partopsep
-%% The first, optional argument is the extra \parskip glue that you get around
-%%     \list environments. It defaults to the value of \parskip.
-\def\codeaux{\@ifnextchar[{\@codeaux}{\@codeaux[\parskip]}} %]
-\def\@codeaux[#1]#2{%
-  \bgroup\parskip#1%
-	 \begin{list}{}%
-	       {\parsep\z@\rightskip\z@\listparindent\z@\itemindent\z@#2}%
-	       \item[]\setupcode\cd@obeylines}%
-\def\endcodeaux{\end{list}\leavevmode\egroup\ignorespaces\global\@ignoretrue}
-
-%% Code env is codeaux with the default margin and spacing \list params:
-\def\code{\codeaux{}} \let\endcode=\endcodeaux
-
-%% Like code, but with no extra vertical space above and below.
-\def\tightcode{\codeaux[=0pt]{\topsep\z@}}%
-\let\endtightcode\endcodeaux
-%  {\vspace{-1\parskip}\begin{codeaux}{\partopsep\z@\topsep\z@}}%
-%  {\end{codeaux}\vspace{-1\parskip}}
-
-
-
-% Reasonable separation between lines of code
-\newcommand{\codeskip}{\penalty0\vspace{2ex}}
-
-
-% \cd is used to build a code environment in the middle of text.
-% Note: only difference from display code is that cr's are taken
-% as unbreakable spaces instead of linebreaks.
-
-\def\cd{\leavevmode\begingroup\ifmmode\let\startcode=\startmcode\else%
-	\let\startcode\starttcode\fi%
-	\setupcode\cd@obeycrsp\startcode}
-
-\def\starttcode#1{#1\endgroup}
-\def\startmcode#1{\hbox{#1}\endgroup}
-
-
-% Restore $&#^_~% to their normal catcodes
-% Define \^ to give the ^ char.
-% \dcd points to this guy inside a code env.
-\def\cd@dcd{\catcode`\$=3\catcode`\&=4\catcode`\#=6\catcode`\^=7%
-	   \catcode`\_=8\catcode`\~=13\catcode`\%=14\def\^{\char`\^}}
-
-% Selectively enable $, and $^_ as special.
-% \cd@mathspecial also defines \^ give the ^ char.
-% \cddollar and \cdmath point to these guys inside a code env.
-\def\cd@dollarspecial{\catcode`\$=3}
-\def\cd@mathspecial{\catcode`\$=3\catcode`\^=7\catcode`\_=8%
-		    \def\^{\char`\^}}
-
-
-% Change log:
-% Started off as some macros found in C. Rich's library.
-% Olin 1/90:
-% Removed \makeatletter, \makeatother's -- they shouldn't be there,
-%   because style option files are read with makeatletter. The terminal
-%   makeatother screwed things up for the following style options.
-% Olin 3/91:
-% Rewritten. 
-% - Changed things so blank lines don't get compressed out (the \leavevmove
-%   in \cd@cr and \cd@crwb). 
-% - Changed names to somewhat less horrible choices. 
-% - Added lots of doc, so casual hackers can more easily mess with all this.
-% - Removed `'"@ from the set of hacked chars, since they are already
-%   non-special. 
-% - Removed the bigcode env, which effect can be had with the \codeallowbreaks
-%   command.
-% - Removed the \@noligs command, since it's already defined in latex.tex.
-% - Win big with the new \dcd, \cddollar, and \cdmath commands.
-% - Now, *only* the chars \{} are special inside the code env. If you need
-%   more, use the \dcd command inside a group.
-% - \cd now works inside math mode. (But if you use it in a superscript,
-%   it still comes out full size. You must explicitly put a \scriptsize\tt
-%   inside the \cd: $x^{\cd{\scriptsize\tt...}}$. A \leavevmode was added
-%   so that if you begin a paragraph with a \cd{...}, TeX realises you
-%   are starting a paragraph.
-% - Added the codebox env. Tricky bit involving the first line hacked
-%   with help from David Long.
-% Olin 8/94
-% Changed the font commands for LaTeX2e.