[wp-trac] [WordPress Trac] #50815: Use `$this->has_items()` for content checks in different list classes.

[WordPress Trac]

#50815: Use `$this->has_items()` for content checks in different list classes.
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 Reporter:  whyisjake                      |      Owner:  (none)
     Type:  defect (bug)                   |     Status:  new
 Priority:  normal                         |  Milestone:  Awaiting Review
Component:  Administration                 |    Version:
 Severity:  normal                         |   Keywords:  needs-patch
  Focuses:  ui, administration, multisite  |
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 As an extension of #40188, let's bring some consistency to `class-wp-
 posts-list-table.php` and `class-wp-ms-sites-list-table.php` to check
 `$this->has_items()`, instead of `! empty( $output )`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/50815>
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