Trying `from dokka` instead of `from ‘dokka’` fail...

# build-tools

[natpryce]

Trying from dokka instead of from ‘dokka’ fails with a runtime type error — I think because the extension and task are both called ‘dokka’ and the extension is resolved instead of the task when you use the identifier dokka. (This is a pain, and why I’ve had to write dependsOn ‘dokka’ instead dependsOn dokka)