Remove all `@package` and `@subpackage` PHPDoc tags not at the file- or class-levels in core.

See #27200.


git-svn-id: https://develop.svn.wordpress.org/trunk@27262 602fd350-edb4-49c9-b593-d223f7449a82
Update the HTML5 Shiv across the default themes to 3.7.0.

props rickalee.
fixes #26491.


git-svn-id: https://develop.svn.wordpress.org/trunk@27263 602fd350-edb4-49c9-b593-d223f7449a82
Clarify return values for get_preferred_from_update_core() and get_core_updates().

props SergeyBiryukov.
fixes #20251.


git-svn-id: https://develop.svn.wordpress.org/trunk@27264 602fd350-edb4-49c9-b593-d223f7449a82