message: add copyanno for safety
diff: @@ -144,6 +144,7 @@ class BreakTransformer(converter.Base):
  orelse=node.orelse)
  new_for_node = node[0]
  + anno.copyanno(original_node, new_for_node, 'extra_test')
  anno.copyanno(original_node, new_for_node, anno.Basic.DIRECTIVES)
  return node
  