pub fn write_boxplot(w: @std::io::Writer, s: &Summary, width_hint: uint)
Render a boxplot to the provided writer. The boxplot shows the min, max and quartiles of the
provided Summary (thus includes the mean) and is scaled to display within the range of the
nearest multiple-of-a-power-of-ten above and below the min and max of possible values, and
target width_hint characters of display (though it will be wider if necessary).
As an example, the summary with 5-number-summary (min=15, q1=17, med=20, q3=24, max=31) might
display as:
10 | [--****#******----------] | 40
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