Test attaching a new <style scoped> element

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--- ORIGINAL ---
S1: rgb(0, 0, 0)
P1: rgb(0, 0, 0)
S2: rgb(0, 0, 0)
P2: rgb(0, 0, 0)
S3: rgb(0, 0, 0)
P3: rgb(0, 0, 0)
--- AFTER ATTACHING <STYLE SCOPED> ---
S1: rgb(0, 0, 0)
P1: rgb(0, 0, 0)
S2: rgb(255, 0, 0)
P2: rgb(0, 128, 0)
S3: rgb(0, 0, 0)
P3: rgb(0, 0, 0)
--- FINISHED ---