[wp-trac] [WordPress Trac] #46568: Twenty Seventeen: Table block th has black border in back-end, but not on front-end

[WordPress Trac]

#46568: Twenty Seventeen: Table block th has black border in back-end, but not on
front-end
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 Reporter:  ianbelanger    |      Owner:  (none)
     Type:  defect (bug)   |     Status:  new
 Priority:  normal         |  Milestone:  Awaiting Review
Component:  Bundled Theme  |    Version:
 Severity:  normal         |   Keywords:  has-screenshots good-first-bug
  Focuses:                 |
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 While testing the table block vs. the classic block containing a table in
 the Twenty Seventeen theme, I noticed that a table containing a `th` will
 have a black `1px border` in the editor, but only the gray `bottom-border`
 on the front-end. See screenshot below

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Ticket URL: <https://core.trac.wordpress.org/ticket/46568>
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