It looks clearer to me, by showing immediately the *constructs* the document talks about. 
In the the original tree , a complete beginner may confuse which are the constructs, and which are the types of scope

Also removed the mention "(don't allow nesting)" in the 5th branch of the tree, as that is already stated by the 1st branch of the tree
(It had actually confused me https://discourse.julialang.org/t/scope-of-struct-and-macro/16714 )