In `paginate_links()`, ensure that query string args are propagated to the resulting paginated links.

Adds unit tests that use `DOMDocument` since `assertTag` is being deprecated - see #29545, [29746].

Props obenland, wonderboymusic.
Fixes #29636.

Built from https://develop.svn.wordpress.org/trunk@29780


git-svn-id: http://core.svn.wordpress.org/trunk@29552 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The joys of `wptexturize()`:

* Revert parts of [28773] and [28727] and [29748].
* Do not crash PHP. Make the shortcode quantifier possessive to avoid backtracks.
* Reduce backtracking in long HTML comments by 100x.
* Do not ignore unclosed HTML comments.
* Do not break unregistered shortcodes, e.g. `[hello attr="value"]`.
* Do not break HTML in shortcode attributes, e.g. `[hello attr="<"]`.
* Do not match for shortcodes when there is extra whitespace, e.g. `[ hello ]`.
* Add unit tests to show #12690 was not fully resolved.
* Tested PHP 5.2.4, 5.2.13, 5.4.32, and 5.5.8.

Adds/modifies unit tests.

Props miqrogroove.
See #29557.

Built from https://develop.svn.wordpress.org/trunk@29781


git-svn-id: http://core.svn.wordpress.org/trunk@29553 1a063a9b-81f0-0310-95a4-ce76da25c4cd
In the form handler logic for `edit-tags.php`, don't redirect until `$_REQUEST['paged']` has been checked. All `switch` cases (except `edit`) now use `break` instead of `exit`. 

Fixes #16162.

Built from https://develop.svn.wordpress.org/trunk@29782


git-svn-id: http://core.svn.wordpress.org/trunk@29554 1a063a9b-81f0-0310-95a4-ce76da25c4cd