Groovy 5 adds a new utility method to create an ascii bar chart.
You can use the bar method in the org.codehaus.groovy.util.StringUtil class.
You can pass a value, a minimum and maximum value and optinally specify the width of the bar chart.
The result is a String value consisting of a number of "blocks".
A block could be whole, but also 1/8 eights of the block are used to get a nice looking bar chart.
How many of these values are needed is based on the input arguments.
With this method you have a nice way to format number values on a command-line.
