Replace each abstract op's preamble with a structured 'header'.#545

Merged

ljharb merged 1 commit intotc39:masterfrom jmdyck:operation_headers

Jul 15, 2021

+5,057-1,504

Commits on Jul 15, 2021

Markup: Introduce structured headers (tc39#545 )

jmdyck
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ljharb
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