Add docblock to appease coding standard

Note that these are useless, as it's the default behaviour to inherit from the
parent docblock.

Author: fredden

Magento2/Sniffs/Legacy/EscapeMethodsOnBlockClassSniff.php

@@ -26,13 +26,19 @@ class EscapeMethodsOnBlockClassSniff implements Sniff
         'escapeXssInUrl' => true,
     ];
 
+    /**
+     * @inheritDoc
+     */
     public function register()
     {
         return [
             T_OBJECT_OPERATOR,
         ];
     }
 
+    /**
+     * @inheritDoc
+     */
     public function process(File $phpcsFile, $stackPtr)
     {
         $tokens = $phpcsFile->getTokens();