The bug

Trust me when I say that the issue is very minor. This is probably the smallest bug I've ever reported.

The patch notes for snapshot 20w45a include spaces between the numbers and the dash in the launcher but not on the website for the third bullet point in the Oxidation section.

Website:

Launcher:

Additionally, the 'New Features in 20w45a' section at the top of the launcher page pluralizes lava cauldrons and candles, unlike the web article. These may be issues with the webpage instead.