Auto merge of #16894 - bzbarsky:two-value-text-overflow, r=manishearth
Auto merge of #16894 - bzbarsky:two-value-text-overflow, r=manishearth

Fix the two-value form of text-overflow to work in stylo

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- [X] These changes fix https://bugzilla.mozilla.org/show_bug.cgi?id=1365168

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