Docs: Miscellaneous docblock corrections and improvements.

See #49572

git-svn-id: https://develop.svn.wordpress.org/trunk@48462 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-dependency.php

@@ -21,7 +21,7 @@ class _WP_Dependency {
 	 * The handle name.
 	 *
 	 * @since 2.6.0
-	 * @var null
+	 * @var string
 	 */
 	public $handle;
 
@@ -29,7 +29,7 @@ class _WP_Dependency {
 	 * The handle source.
 	 *
 	 * @since 2.6.0
-	 * @var null
+	 * @var string
 	 */
 	public $src;
 
@@ -55,7 +55,7 @@ class _WP_Dependency {
 	 * Additional arguments for the handle.
 	 *
 	 * @since 2.6.0
-	 * @var null
+	 * @var array
 	 */
 	public $args = null;  // Custom property, such as $in_footer or $media.