Shortcodes: Clarify the docs for `pre_do_shortcode_tag` and `do_shortcode_tag`.

Props dhanendran.
Fixes #39294.

Built from https://develop.svn.wordpress.org/trunk@39665


git-svn-id: http://core.svn.wordpress.org/trunk@39605 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/shortcodes.php

@@ -332,7 +332,7 @@ function do_shortcode_tag( $m ) {
 	 *
 	 * @param bool|string $return      Short-circuit return value. Either false or the value to replace the shortcode with.
 	 * @param string       $tag         Shortcode name.
-	 * @param array       $attr        Shortcode attributes array,
+	 * @param array|string $attr        Shortcode attributes array or empty string.
 	 * @param array        $m           Regular expression match array.
 	 */
 	$return = apply_filters( 'pre_do_shortcode_tag', false, $tag, $attr, $m );
@@ -351,7 +351,7 @@ function do_shortcode_tag( $m ) {
 	 *
 	 * @param string $output Shortcode output.
 	 * @param string       $tag    Shortcode name.
-	 * @param array  $attr   Shortcode attributes array,
+	 * @param array|string $attr   Shortcode attributes array or empty string.
 	 * @param array        $m      Regular expression match array.
 	 */
 	return apply_filters( 'do_shortcode_tag', $output, $tag, $attr, $m );

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-39663';
+$wp_version = '4.8-alpha-39665';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.