Creating pdf tables from data files with groff

Given a comma separated file with two columns named test.csv, groff can lay this out with the following code:

.TS
allbox, tab(,);
lb rb
l r.
.so test.csv
.TE

To make this work, remember to use the -s flag like so:

groff -s -t test.txt -T pdf | save test.pdf -f