Use new public feature

[mcabbott]

This marks un-exported symbols public, using a new feature of Julia 1.11.

One use is that Flux.mse can be found by tab completion, etc:

julia> Flux.m  # <tab>
mae               make_causal_mask  maxpool
maxpool!          meanpool          meanpool!
mish              modules           mse
msle              multigate

julia> Flux.one  # Flux.o<tab>
onecold
onehot
onehotbatch
ones32

Not certain the list here is complete.

[mcabbott]

I called the macro with brackets just to allow comments like this. But eventual syntax is just public glorot_uniform, glorot_normal like using, for which this isn't possible.

[ToucheSir]

I will express a slight personal preference for this over the indent-only syntax on L60-62, but the best way to settle the debate might be to see what the auto-formatter outputs.

[mcabbott]

All now switched to this format.

[mcabbott]

The autoformatter's opinion is that with two brackets this needs four spaces:

... and that with no brackets, no indent: