fix: ensure all files end with a single newline

Author: Sendi0011

src/gitingest/cli.py

@@ -212,4 +212,4 @@ async def _async_main(
 
 
 if __name__ == "__main__":
-    main()
+    main()

test.txt

@@ -5924,5 +5924,3 @@ async def _assert_basic_repo_fields(url: str) -> IngestionQuery:
     assert query.slug == "user-repo"
 
     return query
-
-