Clean up the implementation and output of Yopt-log-inline

One line per inline request, nested inlines are indented. Log when a
rollback happens. Examples:

```
Inline into scala/collection/SeqLike$$anon$2.andThen: inlined scala/collection/SeqLike$$anon$2.andThen. Before: 8 ins, inlined: 8 ins.
  inlined scala/PartialFunction.andThen$. Before: 20 ins, inlined: 8 ins.
    inlined scala/PartialFunction.andThen. Before: 31 ins, inlined: 10 ins.
```

and

```
Inline into scala/collection/IterableLike$$anon$1.takeWhile: inlined scala/collection/IterableLike$$anon$1.takeWhile. Before: 8 ins, inlined: 8 ins.
  inlined scala/collection/TraversableViewLike.takeWhile$. Before: 20 ins, inlined: 8 ins.
    failed scala/collection/TraversableViewLike.takeWhile. [...] would cause IllegalAccessError [...]
    rolling back, nested inline failed.
```

0 files changed, 0 insertions, 0 deletions