Is it just me or have they provided graphs of LNinput againt LNoutput when the tanh(a*x) is also followed by a weight and bias.

Surely you would want to compare the output of the LayerNorm without the weight and bias to get an impression on their similarity.

I guess it doesn't matter if the final result works, but I feel like looking at the bit that they are changing in isolation might provide a better insight as to what is happening.