Should have take absolute value

[mika314]

If the expected value is greater than calculated the test will give a false positive.

algorithm-archive/contents/approximate_counting/code/julia/approximate_counting.jl

Line 50 in 7ec4fc5

@test ((avg - n_items) / n_items < threshold)

[leios]

Right, we should be using abs. Thanks again for the catch! I'll update the Julia code in #840