[wp-trac] [WordPress Trac] #56291: Theme JSON: Fix notice when unknown elements are specified

[WordPress Trac]

#56291: Theme JSON: Fix notice when unknown elements are specified
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 Reporter:  scruffian     |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  General       |     Version:
 Severity:  normal        |  Resolution:
 Keywords:  has-patch     |     Focuses:
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Comment (by rudlinkon):

 @scruffian thanks for your PR. I checked it yesterday and it looks good to
 me.

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Ticket URL: <https://core.trac.wordpress.org/ticket/56291#comment:2>
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