The twill program is used to create a TeX file for viewing a Web program. It takes appropriate care of
typographic details like page layout and the use of indentation, italics, boldface, etc., and it supplies
extensive cross-index information in the form of 'mini-indexes' for each spread of pages and a 'master
index' at the end that it gathers automatically.
The command line arguments are the same as for weave including the option: -x says to omit the indexes,
module name list, and table of contents pages. (A CONTENTS.tex file will still be written when the TeX
file is processed, however, unless some macros in twimac-web.tex are redefined.)
The output TeX file name is formed by adding .tex to the root of the Web file name.
There are several macros that probably should be redefined by the programmer at the beginning of the Web
file. It is a good idea to set \title to the name of the program.
twill is exactly like weave except that it produces better documentation, for which you must work harder.
You should run twill twice, once to prime the pump and once to get decent answers. Moreover, you must
run the output twice through TeX.
After texfoo you will have output that looks like final pages except that the entries of mini-indexes
won’t be alphabetized. The first run produces a weird file called foo.ref. Say twill-refsort<foo.ref>foo.sref and then another texfoo will produce alphabetized output.
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