suzerain: #2998 editing pass + computation comments

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@42596 0bd85f0b-c151-43b9-a1e9-27231104551f
suzerain: #2998 add univariate two-point details

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@42601 0bd85f0b-c151-43b9-a1e9-27231104551f