[wp-trac] [WordPress Trac] #39728: "Additional CSS" validate syntax error in customizer

[WordPress Trac]

#39728: "Additional CSS" validate syntax error in customizer
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 Reporter:  rishishah     |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Customize     |     Version:  trunk
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:  ui
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Comment (by dd32):

 See also #39198 for where we removed the check for single quotes `'` but
 left it in place for `{`, `}`, and `"`.

 We've also got #39218 to use a tokeniser rather than naive regular
 expressions.

 I don't think we should change it further for the 4.7.x branch myself
 (unless we backport tokenisation). I'd suggest marking this as a duplicate
 of #39218.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39728#comment:2>
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