Fix parsing empty strings

Julien LepillerThu Apr 02 15:27:51+0200 2020

696a4c5

guile-rdf/test-modules
namelast commitdate
online.scmAdd evaluation test supportThu Apr 02 03:41:41+0200 2020
result.scmAdd test infrastructure and turtle testTue Mar 31 04:36:16+0200 2020
testsuite.scmAdd test infrastructure and turtle testTue Mar 31 04:36:16+0200 2020