Predicate argument on both sides of termset similarity query?

[The docs entry for termset-similarity](https://incatools.github.io/ontology-access-kit/cli.html#runoak-termset-similarity) contains this example:

```
runoak -i go.db termset-similarity -p i,p nucleus membrane @ “nuclear membrane” vacuole -p i,p
```

Is this a typo? Does the use of two predicate arguments change anything?

Start with the linked termset-similarity documentation entry and inspect the example containing two -p arguments. Compare the command's behavior with one versus two predicate arguments, then clarify the documentation by correcting the example or explaining the difference; done when the example is unambiguous.

Written by the indexing model from the issue text.