How to reproduce this bug
Take one of the affected blocks/items (Cobblestone Wall, Firefly Bush, Wildflowers, Leaf Litter)
Hover over them
Notice how they have additional spacing after their names.

For example: Instead of "Cobblestone Wall", it would be called "Cobblestone Wall ".

I will make proper screenshots when the preview installs for me. I just saw wattle's video on the newest Preview (as of writing this) and noticed the names of the new items are off. I know Cobblestone Wall is also affected, so I decided to finally report it. Cobblestone Wall's item name is also spaced incorrectly in latest release, idk since when it originally happened, nor if it was spaced incorrectly when it was originally added!