There are few whitespaces before the name. So it splits to next line because the container can't accommodate it completely.
All the spaces have the effect of one single space. Which means one single space will make it to next line. Because it is on the border.
Removing the whitespaces will arrange it in one line
If the devs trim the site name, then it will be aligned perfectly.
This will reduce the distance between the icon and text but it is better than changing the size of container and also better than the 2 line ugly look.
For meta, it is different. Meta got a lot of space but for the main site, it have to accommodate the site name, help, chat and log out button.