TODO: Remove ALL names that begin with an underscore

[DilumAluthge]

I am going to implement a new convention in which all functions that rely on trait-dispatch will have a name that begins with _. This property will be bijective:

• If a function relies on trait-dispatch, it will have a name that begin with _
• If a name begins with _, it will be the name of a function that relies on trait-dispatch

Before I can implement this convention, I will need to remove ALL names that begin with an underscore by renaming them to names that do not begin with underscores. By "names", I not only mean functions but also types, global variables, etc.

Once I have removed all names that begin with an underscore, I will close this issue. Then, I can begin adding functions that rely on trait-dispatch.

There will be only ONE exception to this rule: __init__() functions. These functions are required by Julia to be named __init__(), so I will have to keep that name. There will be no other exceptions.

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Here are some code snippets that I can run in the REPL in order to find any names that begin with an underscore:

for x in names(Main; all=true, imported=true)
    if startswith(strip(string(x)), "_")
        println(x)
    end
end

for x in names(Main.MyExampleModule; all=true, imported=true)
    if startswith(strip(string(x)), "_")
        println(x)
    end
end

for x in names(MyExampleModule; all=true, imported=true)
    if startswith(strip(string(x)), "_")
        println(x)
    end
end