Update cupy/statistics/histogram.py
fix variable name in docstring
@@ -181,7 +181,7 @@ def histogram(x, bins=10, range=None, weights=None, density=False):
number of bins. If ``bins`` is an :class:`~cupy.ndarray`, it
represents a bin edges.
range (2-tuple of float, optional): The lower and upper range of the
- bins. If not provided, range is simply ``(a.min(), a.max())``.
+ bins. If not provided, range is simply ``(x.min(), x.max())``.
Values outside the range are ignored. The first element of the
range must be less than or equal to the second. `range` affects the
automatic bin computation as well. While bin width is computed to
