WARNING: (1) this has not yet been proofread as a printout---just eliminated
problems that TeX complained about.
(2) extraneous line breaks introduced in some examples, sometimes
in ridiculously long strings; this may falsify examples. Places
where I did this are marked by FIXME comments.
1) use makeinfo node defaulting
2) correct bad xref
3) use @display, @exdent, etc. as first approximation to Julia's
clever typewriter markup; **THIS WILL NEED STUDY AND REVISION**
4) introduce many nodes rather than ---- in "detailed reference" appendix
