Ticket #51774: 51774.2.diff

wp-admin/update-core.php

@@ -55 +55 @@
                 $current = true;
         }
 
-        $submit        = __( 'Update Now' );
+        preg_match( '/(alpha|beta|RC)(\d+)/', $version_string, $nightly );
+        $submit        = ! empty( $nightly ) ? __( 'Update to latest nightly' ) : __( 'Update Now' );
         $form_action   = 'update-core.php?action=do-core-upgrade';
         $php_version   = phpversion();
         $mysql_version = $wpdb->db_version();
@@ -65 +66 @@
                 $message = __( 'You are using a development version of WordPress. You can update to the latest nightly build manually:' );
         } else {
                 if ( $current ) {
+                        $message = '';
                         /* translators: %s: WordPress version. */
-                        $message     = sprintf( __( 'If you need to re-install version %s, you can do so here:' ), $version_string );
-                        $submit      = __( 'Re-install Now' );
+                        $submit      = sprintf( __( 'Re-install %s' ), $version_string );
                         $form_action = 'update-core.php?action=do-core-reinstall';
                 } else {
                         $php_compat = version_compare( $php_version, $update->php_version, '>=' );