Clarify swap docs (#2231)

## Checklist

- [-] I have added
[tests](https://www.cursorless.org/docs/contributing/test-case-recorder/)
- [x] I have updated the
[docs](https://github.com/cursorless-dev/cursorless/tree/main/docs) and
[cheatsheet](https://github.com/cursorless-dev/cursorless/tree/main/cursorless-talon/src/cheatsheet)
- [-] I have not broken the cheatsheet

Author: pokey

docs/user/README.md

@@ -563,10 +563,11 @@ Copies the token containing letter 'a' with a blue hat.
 
 ### Swap
 
-Swaps two targets. If the first target is omitted, it will target the current selection. If the targets are list targets they will be zipped together.
+Swaps two targets. If the first target is omitted, it will target the current selection. If `<Target 1>` and `<Target 2>` each consist of multiple targets, they will be zipped together.
 
 - `"swap <TARGET 1> with <TARGET 2>"`
 - `"swap with <TARGET>"`
+- `"swap air and bat with cap and drum"` is equivalent to `"swap air with cap"` and `"swap bat with drum"`
 
 eg:
 `swap blue air with green bat`