'eh?' hard coded into field_timestamp output

Line 170 of field_timestamp includes 'eh?' . This was added in its last commit with no apparent explanation.

$output = '<div class="flexinode-timestamp-'. $field_id .'">eh?'. $output .'</div>';

It causes the "eh?" to appear on every timestamp field output.

For grins, I made a patch, but I haven't done it before so if you use it be sure I did it right.