am 6fbc4eb4: Merge change 7410 into donut

Merge commit '6fbc4eb48bf368199f31a25fae60f8f7a378cc52'

* commit '6fbc4eb48bf368199f31a25fae60f8f7a378cc52':
  Fix bug: Arrays.deepToSting renders "[null]" as "null"; "[[]]" as "[]"; etc.