Reilly Wood 7413ef2824
Tweak run-external signature so command must be a string (#8971)
Tiny fix: clarify in `run-external`'s signature that the external
command must be a string.

### Before
```
Signatures:
  <any> | run-external <any> -> <any>

Parameters:
  command <any>: external command to run
  ...args <any>: arguments for external command
```

### After
```
Signatures:
  <any> | run-external <string> -> <any>

Parameters:
  command <string>: external command to run
  ...args <any>: arguments for external command
```


### Notes

I was hoping to change more `any`s to more specific types, but alas I
think we can only change `command` right now. The input can be any type
and it gets rendered to a string before being passed to the external.
The args can be any value type and they get converted to strings. The
output can be either binary or a string.
2023-04-22 10:57:16 -07:00
..
2023-04-03 04:28:36 +12:00
2023-03-24 14:52:01 +13:00
2023-04-05 18:36:00 -05:00