Regression test suite: fix typo.

test/regression/whitelist.csv

@@ -30,4 +30,3 @@ ORIGINAL FILE;EXPECTED DUMP
 ../models-nonbsd/PK3/SGDTT3.pk3 -ptv -gsn -cts -db;../results/tmp/SGDTT3.pk3_591f74f1/EXPECT
 ../models-nonbsd/PK3/SGDTT3.pk3 ;../results/tmp/SGDTT3.pk3_ad4b2ce1/EXPECT
 ../models-nonbsd/PK3/SGDTT3.pk3 -cfull;../results/tmp/SGDTT3.pk3_ad4b2ce1/EXPECT
-.