DOC changed <= symbol to \leq in tree module documentation
@@ -452,7 +452,7 @@ feature :math:`j` and threshold :math:`t_m`, partition the data into
.. math::
- Q_m^{left}(\theta) = \{(x, y) | x_j <= t_m\}
+ Q_m^{left}(\theta) = \{(x, y) | x_j \leq t_m\}
Q_m^{right}(\theta) = Q_m \setminus Q_m^{left}(\theta)
