Fix spacing in package_lock.bzl files

Author: hoodmane

packages/script.py

@@ -8,7 +8,7 @@
 import tempfile
 import zipfile
 from pathlib import Path
-from textwrap import dedent
+from textwrap import dedent, indent
 
 import boto3
 import re
@@ -63,16 +63,16 @@ def gen_bzl_config(tag: str, dist: Path) -> None:
 
     packages_lock_name = "packages_" + tag.replace(".", "_")
     packages_lock_name_upper = packages_lock_name.upper()
-    packages_lock_json = json.dumps(imports_to_test, indent=3, sort_keys=True)
+    packages_lock_json = indent(json.dumps(imports_to_test, indent=3, sort_keys=True), " "*12).strip()
     Path(dist / (packages_lock_name + ".bzl")).write_text(
         dedent(
-            f"""
+            f"""\
             # This file is automatically generated by the Pyodide build script repo
             # (https://github.com/cloudflare/pyodide-build-scripts) and should not be manually modified.
 
             {packages_lock_name_upper} = {packages_lock_json}
             """
-        ).strip()
+        ).strip() + "\n"
     )