Code Generation Clean Up (Laundry List)

### Empty lines in `_bundle.py`
- within a function, there should be no more than one empty line between statements;
- between classes/top level functions there should be exactly 2 empty lines.

Open `_bundle.py` and inspect the spacing around statements, classes, and top-level functions. Remove runs of multiple empty lines inside functions and ensure exactly two empty lines separate classes and top-level functions; the formatting of that file is the completion check.

Written by the indexing model from the issue text.