Documentation of default LOAD_PATH entries

[carstenbauer]

See https://stackoverflow.com/questions/52378974/in-my-julia-1-0-0-repl-load-path-returns-unexpected-results.

As per default, the load path seems to be

julia> LOAD_PATH
3-element Array{String,1}:
 "@"
 "@v#.#"
 "@stdlib"

Except for comments in the source code itself I couldn't find any documentation of what those things actually mean. People don't really need to know I guess but, still, it should be easy to add this information to the Pkg documentation.

[epogrebnyak]

Are you sure the issue belongs to Pkg.il? The named enviroments like @. get resolved by
Base.load_path_expand(). I agree any piece of documentation would have helped, but perhaps we just need a good docstring for that function in Base to start with.

https://github.com/JuliaLang/julia/blob/7920a2a1fbef934a08b61b4bb26c3147f0bf9e41/base/initdefs.jl#L154-L160

Also may use a very informative answer on related subject.

[carstenbauer]

Are you sure the issue belongs to Pkg.il?

I'm not.

The named enviroments like @. get resolved by Base.load_path_expand(). I agree any piece of documentation would have helped, but perhaps we just need a good docstring for that function in Base to start with.

Actually, I think it makes sense to directly add a docstring to LOAD_PATH, wherever it is defined.

[KristofferC]

Documented well on Julia 1.2+