Pete Bacon Darwin 293270696b build(docs-infra): render optional decorator options with a ? (#39167)
Decorator API pages list all their available options in an overview
table and also in a detailed view. Now the rendered syntax of each
option will show a `?` after the name if the option is not required.
This is inline with how class and interface members are rendered.

PR Close #39167
2020-10-07 13:33:26 -07:00
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