test + python-tools.sh: Fix toplevel "make all" fallout

After a pipeline change, CI now runs "make all" in a repo's root, which uncovers two problems:
1. The help integration test only succeeded as long CI didn't run "make all" before "make test". That way, the checked out repository lacked the generated __init__.py files needed for some modular subcommands to be fully loaded, and hence, the test should have failed. The entire machinery only worked because the subcommands in question are not not essential to building jw-pkg itself: "secrets" and "posix". So, this commit adapts the help integration test to the new reality.
2. Regarding python-tools.sh: Commit 55060486 satisfies yapf in some places of the source code, but in others not anylonger.  So patch python-tools.sh's newline handling again.
While not thematically similar, both fixes get baked into one commit to satisfy the requirement that every single commit needs to pass "make clean all check test" individually.
Signed-off-by: Jan Lindemann <jan@janware.com>

scripts/python-tools.sh

@@ -81,12 +81,12 @@ cmd_create_init()
 			echo "import `module_path $f` as $f"
 			__add_seen $f
 		done
-		echo
 	fi
 
 	if [ ${#seen[@]} -eq 0 ]; then
 		echo "__all__ = []"
 	else
+		echo
 		echo "__all__ = ["
 		for dst_type in ${!seen[@]}; do
 			echo "    \"$dst_type\","