Docs: Corrections and improvements to types used in various docblocks.

See #51800, #52217

Built from https://develop.svn.wordpress.org/trunk@49936


git-svn-id: http://core.svn.wordpress.org/trunk@49635 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/comment.php

@@ -2716,7 +2716,7 @@ function wp_update_comment_count_now( $post_id ) {
  * @since 1.5.0
  *
  * @param string $url        URL to ping.
- * @param int    $deprecated Not Used.
+ * @param string $deprecated Not Used.
  * @return string|false String containing URI on success, false on failure.
  */
 function discover_pingback_server_uri( $url, $deprecated = '' ) {