Incorrect usage of terminal size results in unnecessary wrapping

[766F6964]

Summary:

It seems that duf does not properly use the space available in the terminal, which results in unnecessary linebreaks.
See the following image for reference:

Why does the FILESYSTEM column for the require a line breaks for the root partition? There would be enough space to show it nicely in a single line.
Same with the second table, where there are unnecessary line breaks in the TYPE column? It does make sense for the column MOUNTED ON since /sys/firmware/efi/efivars is fairly long, but it shouldn't have an impact on the other columns, and only break where it makes sense.
I also don't understand why the space to the right of the tables is not utilized? It's almost as if duf thinks the terminal size is smaller than it actually is.

For reference, I use ArchLinux Gnome and the Gnome Terminal (kgx).