Fix verbose printing. First, we are not printing the graph depth, but the maximum number of steps to the center. Second, we can't use SLEAF if the root is specified, since SLEAF is not calculated in that case.
Fix verbose printing. First, we are not printing the graph depth, but the
maximum number of steps to the center. Second, we can't use SLEAF if the root
is specified, since SLEAF is not calculated in that case.

ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz