Index: trunk/src/wp-includes/class-wp-scripts.php
===================================================================
--- trunk/src/wp-includes/class-wp-scripts.php	(revision 62550)
+++ trunk/src/wp-includes/class-wp-scripts.php	(revision 63440)
@@ -202,6 +202,7 @@
 	 * @param bool   $display Optional. Whether to print the extra script
 	 *                        instead of just returning it. Default true.
-	 * @return bool|string|null Null if no data exists, extra scripts if `$display` is true,
+	 * @return bool|string|null Null if no data exists, extra scripts if `$display` is false,
 	 *                          true otherwise.
+	 * @phpstan-return ( $display is true ? true|null : string|null )
 	 */
 	public function print_scripts_l10n( $handle, $display = true ) {
@@ -218,6 +219,7 @@
 	 * @param bool   $display Optional. Whether to print the extra script
 	 *                        instead of just returning it. Default true.
-	 * @return bool|string|null Null if no data exists, extra scripts if `$display` is true,
+	 * @return bool|string|null Null if no data exists, extra scripts if `$display` is false,
 	 *                          true otherwise.
+	 * @phpstan-return ( $display is true ? true|null : string|null )
 	 */
 	public function print_extra_script( $handle, $display = true ) {