Same subsets output in the Google Fonts URLs

[hellor0bot]

Issue description:

Same subsets appear in the Google Fonts source URLs:

Version used:

(Did you try using the develop branch from github? There's a chance your issue has already been adressed there)

The develop branch.

Using theme_mods or options?

theme_mods

Code to reproduce the issue (config + field(s))

Just the default typography fields.

[hellor0bot]

Awesome! Thanks a lot, @aristath!