Use `tbody` as a selector to replace two rulesets by one.

[rastus-vernon]

Selecting all td elements would give the same result. Also, this will not turn off kerning in table captions.

[kennethormandy]

Thanks @rastus-vernon! I am still @extend-ing the base features for tables, but this definitely reduces the complexity of understanding what’s going on there.

If you want to email me your mailing address, I’ll send you a thank you note, it’s the last part of my contributing process. :)

[robsonsobral]

I'm not sure it's cool to revert table headings to defaults for, since we can have numbers on them or even words which repeat on the column.

Maybe it's better to keep thead and tfoot aligning to the columns below and above them.