Fix some @param docs that have chars too close them.

Add `@property` annotations to `WP_User` and `WP_Post`.
Remove erroneous `@param`s from image editor class methods.
Officially add the property `$_column_headers` to `WP_List_Table`.	

See #30799.


git-svn-id: https://develop.svn.wordpress.org/trunk@31127 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/post.php

@@ -455,6 +455,11 @@ function get_post( $post = null, $output = OBJECT, $filter = 'raw' ) {
  *
  * @since 3.5.0
  *
+ * @property-read array  $ancestors
+ * @property-read string $page_template
+ * @property-read int    $post_category
+ * @property-read string $tag_input
+ *
  */
 final class WP_Post {