Typo in Listing 10.5 wrt Figure 10.3?

In the listing `font-size: 0.8rem` is set for both `.button` and `.button--small` selectors, which makes the text size of the two equal, as far as I can tell, but the figure shows (and the text hints) that the latter button has a smaller text.

Question originally asked on [stackoverflow](https://stackoverflow.com/questions/68867486/typo-in-css-in-depth?noredirect=1#comment121709213_68867486).