Confusing example in docs/transform.md summary

In the Transforms documentation page ([docs/transform.md](https://github.com/sindresorhus/execa/blob/HEAD/docs/transform.md)), first chapter "Summary", it looks like the command `npm run build` should produce output "HELLO". First, it's odd that the output would be just "HELLO", as `npm run` usually prints the package version and the effective command before running the latter. Seconds, even if the raw output was "HELLO", shouldn't the transformed output be "INFO: HELLO"?