File endings.
Docblock improvements.
Docblock: Remove leftover @internal.
array type hints
Remove unused key variable in foreach() in TableSection.
Introduce Table::create() for lower PHP versions. We may revert this later.
Split out stuff from Table into TBodyWrapper, and introduce TableSectionInterface
Introduce open-end cells.
Introduce TagAttributes* for Table and TableSection.
Next gen.
Code style: NULL to null
Code style: Only one blank line above namespace.