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\","