filter LineBreak class from table cells

[sHermanGriffiths]

Author's Checklist

Before assigning reviewers, step through the following checklist. Check each item once it's completed. If an item is skipped, write an explanation below the item.

• Construction: Review the code diff and confirm there's no dead code, debug code, or unnecessary comments.
• Requirements: Review the requirements in the issue for this PR and confirm they're all implemented.
• Architecture: Confirm that the changes to the code are consistent with the existing architecture.
• SOUP/OTS Software: Any new dependencies have appropriate licenses and are documented or pinned in requirements files.
  N\A
• Unit Test: Atomic unit tests have been added, if appropriate.
• End-to-End Tests: End-to-end tests have been extended or updated, if appropriate.
  N\A
• Low-level Documentation: Comments or doc strings for affected code have been updated.
  N\A
• High-Level Documentation: The README is updated, as appropriate.
• Change Log: New features or bug fixes have been added to the change log in the README.

[bimbashrestha]

It looks like table is a boolean everywhere else. Should we set a default boolean value rather than None here? Same thing below.