Index: wp-includes/option.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- wp-includes/option.php	(date 1525169993000)
+++ wp-includes/option.php	(date 1526034079000)
@@ -548,7 +548,8 @@
 function delete_option( $option ) {
 	global $wpdb;
 
-	$option = trim( $option );
+	$option = trim( apply_filters( 'delete_option_name', $option ));
+
 	if ( empty( $option ) ) {
 		return false;
 	}