fix pdf generation for general

[Graham Percival]

The attached patch fixes general.pdf.  The texinfo manual suggests
that if you're having problems with macros with texi2dvi (and
texi2pdf), adding the -E macro expansion can fix it.  I tried it,
and it fixed it.

However, I recall that this came up in the past, and somebody said
that we shouldn't use -E for some reason.

Thoughts?

Cheers,
- Graham

0003-Doc-change-build-system-to-fix-broken-macros-in-tex.patch
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