REPL docs for __init__

[fredrikekre]

help?> __init__
search:

Couldn't find __init__
Perhaps you meant @__dot__
  No documentation found.

  Binding __init__ does not exist.

would be good to have. Should be added here: https://github.com/JuliaLang/julia/blob/master/base/docs/basedocs.jl and documented like the other keywords I guess.

[Moelf]

I'd like to contribute, is this a good source document to paraphrase from?
https://docs.julialang.org/en/v0.6.0/manual/modules/

[fredrikekre]

Great! Yes, although use the v1 version of the docs: https://docs.julialang.org/en/v1/manual/modules/. Just a short summary of what it does, when it is called and maybe what it can useful for would be great!

[Moelf]

Can we maybe merge this?

[fredrikekre]

#31930