minor faq changes

[Robin Fairbairns]

a public-spirited user pointed out that one answer descended into
gibberish; investigating the cause, i found a general (small) problem
with the html-generation code, which i corrected.  i've installed the
update on http://www.tex.ac.uk/faq

in the course of making the change, i spotted a small number of
minuscule updates that needed doing and typos that needed correction.
i've therefore also pushed the source release to ctan
(help/uk-tex-faq).

distribution-builders will find a copy formatted for them in the
"usual place".

Robin Fairbairns

As FAQ maintainer, and for the CTAN team