printmd2() functions to print Markdown2 trees in Documenter

Markdown2.printmd2.jl

# printmd2
const INDENT = ".   "

printmd2(xs :: Markdown2.MD) = printmd2(xs.nodes)

function printmd2(xs :: Vector; indent=0)
    for x in xs
        printmd2(x; indent = indent)
    end
end

function printmd2(x::T; indent=0) where T <: Markdown2.MarkdownNode
    if :nodes in fieldnames(T)
        print(INDENT^indent)
        print(typeof(x))

        print(" : ")
        for field in fieldnames(T)
            field == :nodes && continue
            print("$field='$(getfield(x, field))' ")
        end

        println()
        printmd2(x.nodes; indent = indent + 1)
    else
        print(INDENT^indent)
        print(x)
        println()
    end
end

function printmd2(x::Markdown2.List; indent=0)
    print(INDENT^indent)
    print(typeof(x))

    print(" : ")
    for field in fieldnames(Markdown2.List)
        field == :items && continue
        print("$field='$(getfield(x, field))' ")
    end

    println()
    printmd2(x.items; indent = indent + 1)
end

function printmd2(x::Markdown2.Table; indent=0)
    print(INDENT^indent)
    print(typeof(x))

    print(" : ")
    for field in fieldnames(Markdown2.Table)
        field == :cells && continue
        print("$field='$(getfield(x, field))' ")
    end

    println()

    for i = 1:size(x.cells, 1), j = 1:size(x.cells, 1)
        print(INDENT^(indent+1))
        println("cell $i - $j")
        printmd2(x.cells[i,j]; indent = indent + 2)
    end
end