Bug
Bug

- The burndown chart was reserving space for the y-axis labels based
  on the maximum value in the data.  This is wrong.  Instead it should
  have used the maximum *label*.  Consider a graph with a maximum value
  of 99, having a width of 2 characters.  The graph labels should go up
  to 100, not 99, and therefore will take up 3 characters.

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