Add coverage

bin/varnishtest/tests/u00006.vtc

@@ -60,6 +60,10 @@ shell -err -expect "Cannot open output file (No such file or directory)" \
 shell -err -expect "Only one of -n and -r options may be used" \
 	{varnishlog -n ${v1_name} -r ${v1_name}/_.vsm}
 
+shell -err -expect "Unterminated string" \
+	{varnishlog -q '"b\\la'}
+shell -err -expect "Syntax error" \
+	{varnishlog -q ' / '}
 shell -err -expect "Expected integer got '}" \
 	"varnishlog -q {}"
 shell -err -expect "Expected positive integer" \