More user friendly end message when running make test

Makefile

@@ -22,7 +22,12 @@ test: ## Run everything but just with 3 batches to test full pipeline
 	snakemake $(SMK_PARAMS) -j 99999 --config batches=data/batches_small.txt -- download  # download is not benchmarked
 	scripts/benchmark.py --log logs/benchmarks/test_match_$(DATETIME).txt "snakemake $(SMK_PARAMS) --config batches=data/batches_small.txt nb_best_hits=1 -- match"
 	scripts/benchmark.py --log logs/benchmarks/test_map_$(DATETIME).txt   "snakemake $(SMK_PARAMS) --config batches=data/batches_small.txt nb_best_hits=1 -- map"
-	diff -s <(gunzip --stdout output/reads_1___reads_2___reads_3___reads_4.sam_summary.gz | cut -f -3) <(xzcat data/reads_1___reads_2___reads_3___reads_4.sam_summary.xz | cut -f -3)
+	@if diff -q <(gunzip --stdout output/reads_1___reads_2___reads_3___reads_4.sam_summary.gz | cut -f -3) <(xzcat data/reads_1___reads_2___reads_3___reads_4.sam_summary.xz | cut -f -3); then\
+	    echo "Success! Test run produced the expected output.";\
+	else\
+	    echo "WARNING: FAIL. Test run DID NOT produce the expected output.";\
+	    exit 1;\
+	fi
 
 download: ## Download the 661k assemblies and COBS indexes, not benchmarked
 	snakemake $(SMK_PARAMS) -j 99999 -- download