fix: adding and removing css classes that contained spaces #6455
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The basics
npm run format
andnpm run lint
The details
Resolves
Fixes #6454
Proposed Changes
Adds proper splitting to addClass and removeClass. Changes everything back to using addClass and removeClass
Behavior Before Change
We had things in core that implicitly supported applying multiple classes separated by spaces, which recently broke.
Behavior After Change
Now it is working once again.
Reason for Changes
Regressions are sad.
Test Coverage
Added a test specifically for applying multiple classes to an icon, cuz it was easy. But generally I'm just trusting that my fixes are correct.
Documentation
N/A
Additional Information
N/A