Eliminate the use of `extract()` in `the_taxonomies()`. Adds unit test.

See #22400.

Built from https://develop.svn.wordpress.org/trunk@28421


git-svn-id: http://core.svn.wordpress.org/trunk@28248 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/taxonomy.php

@@ -3695,9 +3695,8 @@ function the_taxonomies($args = array()) {
 	);
 
 	$r = wp_parse_args( $args, $defaults );
-	extract( $r, EXTR_SKIP );
 
-	echo $before . join($sep, get_the_taxonomies($post, $r)) . $after;
+	echo $r['before'] . join( $r['sep'], get_the_taxonomies( $r['post'], $r ) ) . $r['after'];
 }
 
 /**