minor changes on outdated package helper

Makefile

@@ -49,7 +49,7 @@ build/%: ## build the latest image for a stack
 build-all: $(foreach I,$(ALL_IMAGES),arch_patch/$(I) build/$(I) ) ## build all stacks
 build-test-all: $(foreach I,$(ALL_IMAGES),arch_patch/$(I) build/$(I) test/$(I) ) ## build and test all stacks
 
-check_outdated/%: ## Check the outdated conda packages in a stack and produce a report (experimental)
+check-outdated/%: ## check the outdated conda packages in a stack and produce a report (experimental)
 	@TEST_IMAGE="$(OWNER)/$(notdir $@)" pytest test/test_outdated.py
 
 dev/%: ARGS?=

test/test_outdated.py

@@ -73,7 +73,7 @@ def print_result(installed, result):
     nb_updatable = len(result)
     updatable_ratio = nb_updatable / nb_packages
     LOGGER.info(
-        f"{nb_updatable} packages can be updated over {nb_packages} -> {updatable_ratio:.0%}"
+        f"{nb_updatable}/{nb_packages} ({updatable_ratio:.0%}) packages could be updated"
     )
     LOGGER.info(f"\n{tabulate(result, headers='keys')}\n")