do not show the strings we are looking for, so it's easier to find them in the log

starpu.mk

@@ -1,12 +1,12 @@
 showcheck:
 	-cat $(TEST_LOGS) /dev/null
-	! grep -q "ERROR: AddressSanitizer: " $(TEST_LOGS) /dev/null
-	! grep -q "WARNING: AddressSanitizer: " $(TEST_LOGS) /dev/null
-	! grep -q "ERROR: ThreadSanitizer: " $(TEST_LOGS) /dev/null
-	! grep -q "WARNING: ThreadSanitizer: " $(TEST_LOGS) /dev/null
-	! grep -q "ERROR: LeakSanitizer: " $(TEST_LOGS) /dev/null
-	! grep -q "WARNING: LeakSanitizer: " $(TEST_LOGS) /dev/null
-	! grep -q " runtime error: " $(TEST_LOGS) /dev/null
+	@! grep -q "ERROR: AddressSanitizer: " $(TEST_LOGS) /dev/null
+	@! grep -q "WARNING: AddressSanitizer: " $(TEST_LOGS) /dev/null
+	@! grep -q "ERROR: ThreadSanitizer: " $(TEST_LOGS) /dev/null
+	@! grep -q "WARNING: ThreadSanitizer: " $(TEST_LOGS) /dev/null
+	@! grep -q "ERROR: LeakSanitizer: " $(TEST_LOGS) /dev/null
+	@! grep -q "WARNING: LeakSanitizer: " $(TEST_LOGS) /dev/null
+	@! grep -q " runtime error: " $(TEST_LOGS) /dev/null
 	RET=0 ; \
 	for i in $(SUBDIRS) ; do \
 		make -C $$i showcheck || RET=1 ; \