extenstion should be extension
Thanks! Maybe you would want to fix it yourself? :) It's a great first starter issue.
Would love to. Github for newbies can be _overwhelming._ If you can point me in the right direction this one time, I won’t ask again.
Go to the file and press "edit" here:

The correct the typo and send a PR.
I _think_ I just did. I clicked the pencil icon and was told I had to be on a branch (fork?). I chose master, and then I was able to edit. Thanks, Daniel. Hope my little piddly effort helps. I’ll keep my eyes open for more!
Great!
Now you need to send it to this repo with a PR.
Thanks for the hand-holding @enoch85 — I thought I’d finished it the first time but apparently I didn’t complete all steps. Looks like it stuck this time.