Variable spacing markdown list rendering

The spacing between list items might as well represent whether the list
is a tight or loose list.

stdlib/Markdown/src/render/terminal/render.jl

@@ -76,7 +76,7 @@ function term(io::IO, md::List, columns)
             print(io, lstrip(line))
             l < length(lines) && println(io)
         end
-        i < length(md.items) && println(io)
+        i < length(md.items) && print(io, '\n'^(2 - md.loose))
     end
 end