make sure that line chart titles are recreated after filtering. not sure...

... how to create a proper test spec for this.

My apologies, I'm a bit of a github n00b. The actual change for this is in src/line-chart.js

The issue that I am resolving is that when more than one filter is applied to a line chart the line chart redraws correctly, but the rendered titles (for the dots) still show the original data values. You can see this behavior in the existing stock example by filtering the bubble chart to the year 2008. Then inspect 1/1/2008. You will see that 'Monthly Index Move' is 645.46 and 'Monthly Index Average' is 1888.00. Next, select Gain from the Gain/Loss pie chart. You will see the values stay the same.

What is interesting is that I see the code from the example page linked (which is an even better change than I am submitting) but when I browse the dc.js source in git hub it is still setting the title on enter rather than on 'update'.

Anyway, wanted to point this issue out. When I install from bower or run the example page from dc.js master I'm still seeing the line chart titles not updating correctly on filter.

Cheers