How do you edit a Scribunto-based MediaWiki template?

Question

I have imported a few templates to my wiki from Wikipedia. I believe most of them use Scribunto. None of this was a problem until recently, when I needed to edit one of them.

The template in question is Wikipedia's {{Key press}}. The source code seems to be quite empty:

<includeonly>{{{{{♥|safesubst:}}}#invoke:key|keypress}}</includeonly><noinclude>
{{documentation}}
</noinclude>

My question is this: where do you find the actual source code?

Answer 1

{{#invoke:key|keypress}} calls the keypress method in the object returned by Module:Key.