Description

I think this might be variable and hard to pin down, but for some reason, the code in the instructions is sometimes off by one line. It's typically that there's a trailing new line, but it ends up throwing off the highlighting as a result. This is an issue in prod and staging.

Steps to repro

1. Visit https://projects.raspberrypi.org/en/projects/editor-hello-world/editor
2. Go to step 3
3. The highlighting is on the comment instead of the code , the line numbers disappear one line before the code

Expected behaviour

The line numbers and highlighting match up with the lines of code.

Note this might be because:

• Use of emojis throw off the line height
• Random whitespace new lines added at the top of the code block

Screenshots