Example `notebooks/series_recipes.ipynb` does not work

[mmikhasenko]

It seems that syntaxis has changed as some point (I am with julia 1.1, Plots v0.26.0).

@recipe function f(::Type{Val{:my_histogram}}, x, y, z)
    edges, counts = myhist!(d) # leads to the error

The error is UndefVarError: d not defined

I do not see with @macroexpand how the d would appear in there