Docs: Consistently include an empty line between @since tag and @see, @link, or @global, per the documentation standards.

See #49572.

git-svn-id: https://develop.svn.wordpress.org/trunk@48067 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/update-core.php

@@ -11,6 +11,7 @@
  * Stores files to be deleted.
  *
  * @since 2.7.0
+ *
  * @global array $_old_files
  * @var array
  * @name $_old_files
@@ -1314,14 +1315,16 @@ function update_core( $from, $to ) {
 
 /**
  * Copies a directory from one location to another via the WordPress Filesystem Abstraction.
+ *
  * Assumes that WP_Filesystem() has already been called and setup.
  *
- * This is a temporary function for the 3.1 -> 3.2 upgrade, as well as for those upgrading to
- * 3.7+
+ * This is a temporary function for the 3.1 -> 3.2 upgrade, as well as for those
+ * upgrading to 3.7+.
  *
  * @ignore
  * @since 3.2.0
- * @since 3.7.0 Updated not to use a regular expression for the skip list
+ * @since 3.7.0 Updated not to use a regular expression for the skip list.
+ *
  * @see copy_dir()
  *
  * @global WP_Filesystem_Base $wp_filesystem