Level 3 Challenge 5: unable to advance

[okofish]

At level 3 challenge 5 one is prompted to enter print poem.lines.to_a.reverse.join. Entering this will advance the lesson. If one accidentally/experimentally enters poem.lines.to_a.reverse.join without the print, irb returns Make sure to print the reversed lines of the poem. But then when one enters the correct prompt to advance the lesson, it remains at its location and one must enter next to continue.

I am assuming this is a bug and not a feature, so I thought I'd inform you about it. TryRuby is really quite awesome!