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Date:         Tue, 21 Aug 2012 17:51:52 +0200
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From: Bruno Le Floch <blflatex@GMAIL.COM>
Subject: Re: l3doc.pdf
To: LATEX-L@listserv.uni-heidelberg.de
In-Reply-To:  <5032AD8E.20103@morningstar2.co.uk>
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Status: R

On 8/20/12, Joseph Wright <joseph.wright@morningstar2.co.uk> wrote:
> On 20/08/2012 18:31, Joel C. Salomon wrote:
>> Also, when typesetting it on my own system, I get this error message
>>
>> (./l3doc.ind [47]
>> ! Misplaced alignment tab character &.
>> l.9   \item \verb*&\&&
>>                       \pfill \hdclindex{1129}{}{0}, \hdclindex{1142}{}{0}
>> ?
>
> Typesets fine here at present.

I get the same error as Joel.  Joseph, did you run makeindex?  I'm running

pdflatex l3doc.dtx
makeindex -q -s l3doc.ist -o l3doc.ind l3doc.idx
pdflatex l3doc.dtx

to get the error.  The problem comes from indexing the \& command when
the \verbatimchar used by indexing macros is &.  Ideally, we could
change the verbatim character depending on the function being indexed.
 The same error occurs with one of the l3fp files IIRC, since &
appears in a \begin{macro} argument.  Changing the \verbatimchar to
something else would just be a temporary fix.

Bruno