commit 09380a4ae412e986ea39eb7163f5a6b3e5b04bbc
Author: Ross Kirsling <rkirsling@gmail.com>
Date:   Tue Dec 3 13:28:15 2019 -0800

    Add test verifying that optional call preserves `this`. (#2436)
    
    * Add test verifying that optional call preserves `this`.
    
    * Update test/language/expressions/optional-chaining/optional-call-preserves-this.js
    
    Co-Authored-By: Leo Balter <leonardo.balter@gmail.com>
