highslide-software/highcharts.com — pull request #1273 by narenranjit (2012-10-01 19:31:09+00:00)
Title: Fixed incorrect y-axis label splitting on "-"

If you look at http://jsfiddle.net/pQXq7 you'll see that the y-axis label is breaking "-5M" into two different lines which does not seem right. I imagine the original intention was to break labels like "50-75" into two different lines, which makes sense.

Added a patch to make it work with both these cases http://jsfiddle.net/pQXq7/2/