fix example section of cupy.ndarray
@@ -1471,8 +1471,8 @@ cdef class ndarray:
CuPy handles out-of-bounds indices differently from NumPy.
NumPy handles them by raising an error, but CuPy wraps around them.
- Examples
- --------
+ Example:
+
>>> a = cupy.arange(3)
>>> a[[1, 3]]
array([1, 0])
