alt Hacker NewsStill doesn't work for me in a new session separate browser. I get the output but I also get this message
Output does not match expected lines - try again
For clean session it goes to the next level.
There is some mess if you already finished the thing, and then use url to particular level on a clean session. For me it looked like I am on level 2, but site expected answers to 1.
When I start from scratch with proper link (main page) simple:
grep laugh *
works