Update operations_on_arrays.rst
Update operations_on_arrays.rst

Remove weirdo unicode – and just use a normal -(cherry picked from commit 0d49de51b79eacccf5b93a6fa67478a59ffd246d)

apavlenko/opencv,opencv/opencv,apavlenko/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv