Fix generating turtle typed value

Julien LepillerTue Dec 01 15:45:50+0100 2020

1a792ac

guile-rdf/tests
namelast commitdate
nquads.scm.inSwitch tests to srfi-64Wed Oct 07 01:14:41+0200 2020
semantics.scm.inSwitch tests to srfi-64Wed Oct 07 01:14:41+0200 2020
turtle.scm.inSwitch tests to srfi-64Wed Oct 07 01:14:41+0200 2020