Even if your primary role with Bloomberg is not officially as an editor, the interviewer will want to see that you have a solid basis when it comes to language, context, tone, grammar, spelling, and more. Emphasize your solid command of the language, and your ability to pay attention to the small details. Discuss the types of editing jobs you have taken on in the past.
"I have helped to edit documents large, and small, including whitepapers, web copy, and sales contracts. I am confident in my language, spelling, and grammar skills. It's rare that a mistake will get past me, as I pay strong attention to the small details."
"Although I have not formally edited a document of significance, I do always make a habit of double checking my emails and other internal or external communication. I have used editing programs such as Grammarly in the past, for assignments and papers while attending university."