Docs: Make the `@return` tag for `Translation_Entry::key()` more precise.

Props manooweb.
Fixes #55640.
Built from https://develop.svn.wordpress.org/trunk@53305


git-svn-id: http://core.svn.wordpress.org/trunk@52894 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/pomo/entry.php

@@ -84,9 +84,9 @@ if ( ! class_exists( 'Translation_Entry', false ) ) :
 		}
 
 		/**
-		 * Generates a unique key for this entry
+		 * Generates a unique key for this entry.
 		 *
-		 * @return string|bool the key or false if the entry is empty
+		 * @return string|false The key or false if the entry is empty.
 		 */
 		public function key() {
 			if ( null === $this->singular || '' === $this->singular ) {

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.0-beta3-53304';
+$wp_version = '6.0-beta3-53305';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.