tooltipHeaderFormatter function in Highstock doesn't format output data properly.

[jrutkowski]

According to documentation, the Tooltip.tooltipHeaderFormatter function in Highstock should replace variables enclosed in curly brackets, which it doesn't.

In the example: http://jsfiddle.net/sFYZ8/ a string "{point.total}" remains unchanged in every tooltip, while in regular Highcharts ( http://jsfiddle.net/yXu8P/ ), the same code works as it should. I believe that this is not intended and should considered as bug.

Hotfix, that works for me: http://jsfiddle.net/F92zw/