Float inside table cell breaks adjacent cell layout

[bsweeney]

When a table cell contains a floated element, line boxes in adjacent cells are unnecessarily cleared.

The following HTML:

<table border="1">
    <tr>
        <td>
            <div style="float: right;">test</div>
        </td>
        <td width="1em;">
            text spanning more than one line
        </td>
    </tr>
</table>

renders with a gap between the first and second lines in the adjacent cell:

when it should render with no gap:

Originally posted by @bsweeney in #3400 (reply in thread)

[bsweeney]

Also note the incorrect positioning of the floated text.