Chart.js: BUG - Tooltip label without displayColors and label in Bar Charts

[CobraKiller1787]

Expected Behavior

Setting displayColors = false without setting a label should show only the value in the tooltip label

Current Behavior

The value in the tooltip is preceded by a colon.

Steps to Reproduce

1. Create a bar chart
2. Set displayColors to false
3. Do not set a label for the dataset
4. Hover on a bar
5. The number is preceded by a semicolon
   See an example here http://codepen.io/anon/pen/oYVQgO

Environment

• Chart.js version: 2.4.0
• Browser name and version: any

[etimberg]

Cause of this is: https://github.com/chartjs/Chart.js/blob/master/src/core/core.tooltip.js#L71

Work-around is to set a different callback function in the config that doesn't insert the semicolon.

[CobraKiller1787]

Exactly what I did to fix this issue, but I think it should be a default behaviour.

[etimberg]

Great. I'm happy to look at a PR for this if you have time :)

[JemarJones]

I'm still seeing this exact issue on the latest version.