Addition to Flexbug #9: IE11 <tr> Element (Table Row) does not Support Flexbox

[teetotum]

<tr> elements in IE11 ignore dispaly: flex; and instead render their children as plain old table cell elements.

live demo JSBin showing the issue (when opened in IE11)

In Chrome the two <td> elements are rendered as flexbox children with their margin applied correctly.
In IE11 the two <td> elements are still rendered as table row cells.