too many args to [] shouldn't throw an error
too many args to [] shouldn't throw an error

Discussion: http://arclanguage.org/item?id=17558
Uses a lesser-known feature of make-br-fn.arc: '__ is a rest arg.
  https://github.com/nex3/arc/commit/fb7427df7d

LaxWorks/news,LaxWorks/news,LaxWorks/news,LaxWorks/news