Test denominator units using the correct syntax (#2027) #1613

Job	Run time
Language \| Dart Sass \| Dart stable	1m 4s
JS API \| Pure JS \| Browser	1m 29s
Language \| Dart Sass \| Dart dev	1m 8s
JS API \| Embedded \| Node lts/* \| ubuntu-latest	4m 44s
JS API \| Pure JS \| Node lts/* \| ubuntu-latest	1m 23s
JS API \| Embedded \| Node lts/* \| windows-latest	6m 31s
JS API \| Pure JS \| Node lts/* \| windows-latest	3m 45s
Lint spec files	15s
JS API \| Embedded \| Node lts/* \| macos-latest	3m 29s
JS API \| Pure JS \| Node lts/* \| macos-latest	1m 12s
Static analysis	21s
JS API \| Embedded \| Node lts/-1 \| ubuntu-latest	4m 53s
JS API \| Pure JS \| Node lts/-1 \| ubuntu-latest	1m 23s
JS API \| Embedded \| Node lts/-2 \| ubuntu-latest	5m 5s
Unit tests	39s
JS API \| Pure JS \| Node lts/-2 \| ubuntu-latest	1m 25s
JS API \| Embedded \| Node lts/-3 \| ubuntu-latest	1m 40s
JS API \| Pure JS \| Node lts/-3 \| ubuntu-latest	1m 26s
	41m 52s

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