Display(img) prints output additionally to showing image in Atom

MWE

using Colors, TestImages, ImageIO, ImageShow, FileIO
img = testimage("cameraman.tif");
display("image/png", img);

Additionally to displaying the image in the Plots pane of Atom (which is what I want) it also prints to the output:

512×512 Array{Gray{N0f8},2} with eltype Gray{Normed{UInt8,8}}:
 Gray{N0f8}(0.612)  Gray{N0f8}(0.616)  Gray{N0f8}(0.627)  Gray{N0f8}(0.624)  …

I believe I didn’t have this (undesirable) behavior earlier. Could it be update to 1.5 ?