* Check that "pkg list" lists the packages generate_html and quaternion.
* Run collect_texinfo_strings within Octave.  This script collects the Texinfo strings from all
  functions listed in the package's INDEX file and writes them to the file functions.texi.
  Don't edit the file functions.texi since your changes will be lost by the next run.
* Adapt version number in quaternion.tex
* Run quaternion.tex 


pdftex quaternion.tex
q

Alternatively:
Run generate_quaternion_pdf
