[OS X TeX] i-Installer TeX installation on Intel

[George Gratzer]

It indeed works. Thanks.

Since I do not program in TeX, your explanation is beyond me, but who  
cares.

May I express my great pleasure with this group. It is indeed nice to  
be guided by a group of nice, helpful, knowledgeable people.

GG
P.S. Will this make it into LaTeX? G.

On May 5, 2006, at 4:11 PM, Morten Høgholm wrote:

> On Thu, 04 May 2006 20:01:23 +0200, George Gratzer  
> <gratzer at ms.umanitoba.ca> wrote:
>
>> Two things:
>>
>> 1. I got a bunch of error messages wanting to put $ signs in the  
>> middle of a verbatim environment. Not all, but a few per chapter.
>>
>> 2. It wants to put $ signs following an EOL. Used BBEdit to change  
>> the EOL to Unix or Mac, but it did not help.
>
> I found the bug.
>
> In the new xspace, there is a definition for setting up active  
> characters which goes like this:
>
>   \def\@xspace at eTeX@setup{%
>     \begingroup
>       \everyeof{}%
>       \endlinechar=-1\relax
>       \catcode`\ =10\relax
>       \makeatletter
>       \scantokens\expandafter{\expandafter\gdef
>         \expandafter\@xspace at exceptions@tlp
>         \expandafter{\@xspace at exceptions@tlp}}%
>     \endgroup
>   }
>
> The idea is to re-read the list of exceptions but with current  
> catcodes. The implementation shown above requires \, { and } to  
> have the usual catcodes of 0, 1 and 2 but in George's example,  
> \xspace was called in a header in the output routine but in a  
> setting where the verbatim environment is actually active. Hence  
> this leads to an error because the inner \, { and } in this  
> \scantokens have catcodes 12.
>
> The solution is to change the expansion order (and recalling that  
> \scantokens is expandable):
>
>   \def\@xspace at eTeX@setup{%
>     \begingroup
>       \everyeof{}%
>       \endlinechar=-1\relax
>       \catcode`\ =10\relax
>       \makeatletter
>       \expandafter\expandafter\expandafter\gdef
>       \expandafter\expandafter\expandafter\@xspace at exceptions@tlp
>       \expandafter\expandafter\expandafter{%
>         \expandafter\expandafter\expandafter
>         \scantokens\expandafter{\@xspace at exceptions@tlp}}%
>     \endgroup
>   }
>
> George, add this to your preamble - surrounded by the usual  
> \makeatletter and \makeatother of course - and I predict it'll  
> work... Thanks for bringing this to my attention!
>
> Lesson to learn: Never let a catcode into your life.
> -- 
> Morten
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