tweak test file for N-Triple validation

tests added    : no
tests run      : java tests
performance    : no change
release note   : none, change in test suite only

The example.nq file contains an IRI with a spurious space in it. The N-Triples
specification says that IRIs must follow:

IRIREF	      ::=  '<' ([^#x00-#x20<>"{}|^`\] | UCHAR)* '>'

so the space is a no-no.

Change-Id: I0b63a8c1053b36f18025e1b88b0c33046dd883dd
Reviewed-on: https://gerrit.franz.com:9080/4236
Reviewed-by: Ahmon Dancy <dancy@franz.com>
Reviewed-by: John O'Rourke <jor@franz.com>
Tested-by: Kevin Layer <layer@franz.com>