Log messages don't seem to pretty print anymore

When running `reduce-log` after the `aether` refactor, I get this for the recommendation message:

```
135.9: SUPERVISOR @ #<ADDRESS CHANNEL318588117> logged GOT-RECOMMENDATION:
    (SOURCE-ROOT #<ADDRESS CHANNEL318584031> RECOMMENDATION TRADE-BOUNDARIES
     WEIGHT 0 EDGES
     (#<[#<ADDRESS CHANNEL318572636>: #<ADDRESS CHANNEL318543724>--]--->#<ADDRESS CHANNEL318543726>>))
```