On 03/06/13 16:31, Brian May wrote:
> What does @tex do? I tried searching the documentation
> at http://www.gnu.org/software/texinfo/manual/texinfo/texinfo.html but
> with no luck. There is @TeX{} but that appears to be different. Doesn't
> look like anything to do with TeX to me.

"@tex" is for embedding raw tex commands. However most of the stuff
inside that clause is still texinfo commands. It is trying to set up a
macro to do subscripts.

http://www.gnu.org/software/texinfo/manual/texinfo/html_node/Raw-Formatter-Commands.html

> @tex
> @def@xsub#1{$_{#1}$}
> @global@let@sub=@xsub
> @end tex

Apparently there was a patch for this section for texinfo-5.1:
https://github.com/heimdal/heimdal/commit/1846c7a35d1091d3b6140c56befd7fee0a91dcbb

@iftex
@macro sub{arg}
@textsubscript{\arg\}
@end macro
@end iftex

regards, Glenn
-- 
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