:total_allocated_object was renamed to :total_allocated_objects
:total_allocated_object was renamed to :total_allocated_objects

```
% irb -robjspace
irb(main):001:0> GC.stat[:total_allocated_object]
(irb):1: warning: GC.stat keys were changed from Ruby 2.1. In this case,
you refer to obsolete `total_allocated_object' (new key is
`total_allocated_objects'). Please check
<https://bugs.ruby-lang.org/issues/9924> for more information.
=> 86940
```

tmm1/rblineprof,tmm1/rblineprof