Texturize: Only convert & to & within text nodes.

Previously, `&` would be converted everywhere, which caused problems when it was converted within a `<script>`, for example.

`convert_chars()` is now removed from the `the_content` filter, as it was doing the same job as `wptexturize()`.

KSES correctly handles converting `&` within HTML attributes, so there's no need for `wptexturize()` and `convert_chars()` to do the same job.

Fixes #34698.


Built from https://develop.svn.wordpress.org/trunk@35709


git-svn-id: http://core.svn.wordpress.org/trunk@35673 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-beta4-35708';
+$wp_version = '4.4-beta4-35709';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.