replace darwin16 with darwin16 for consistency
@@ -16,7 +16,7 @@ MAX_EPSILON=16
# Prepare working directory and copy all necessary files.
# In particular copy attacks defenses and dataset, so originals won't
# be overwritten.
-if [[ "$OSTYPE" == "darwin"* ]]; then
+if [[ "${OSTYPE}" == "darwin"* ]]; then
WORKING_DIR="/private"$(mktemp -d)
else
WORKING_DIR=$(mktemp -d)
