Add file size to attachment publish meta box. props desrosj. fixes #25170.

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git-svn-id: http://core.svn.wordpress.org/trunk@25333 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix the failing `Tests_Link::test_wp_get_shortlink()` assertion:

* `wp_get_shortlink()` was firing a notice when reading `$post->ID` while `$post` was null in some cases
* Before the assertions that assume `$GLOBALS['post']` is not set, call `unset( $GLOBALS['post'] );` - there was global spillage from other tests

See #25282.



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git-svn-id: http://core.svn.wordpress.org/trunk@25334 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: fix comment for `twentyfourteen_excerpt_length()`, props SergeyBiryukov. Fixes #25297.
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git-svn-id: http://core.svn.wordpress.org/trunk@25335 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Inline docs for hooks in `wp-includes/nav-menu-template.php`. props Faison. see #25229.

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git-svn-id: http://core.svn.wordpress.org/trunk@25336 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Inline docs for hooks in `wp-admin/options-writing.php`. props siobhyb. see #25229.

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git-svn-id: http://core.svn.wordpress.org/trunk@25337 1a063a9b-81f0-0310-95a4-ce76da25c4cd
No space between // and duplicate_hook. see #25229

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git-svn-id: http://core.svn.wordpress.org/trunk@25338 1a063a9b-81f0-0310-95a4-ce76da25c4cd