Improve PHPDoc formatting for `get_the_permalink()`.

See #27700.

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wpdb: Don't pass a second argument to mysqli_fetch_field().

props pento.
fixes #27693.

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git-svn-id: http://core.svn.wordpress.org/trunk@27832 1a063a9b-81f0-0310-95a4-ce76da25c4cd