Ancient Quotation Marks?

I was startled to read the following in the article linked above (emphasis mine):

'Instone-Brewer radically reinterprets the first passage using, of all things, quotation marks. The Greek of the New Testament didn't always contain them, and scholars agree that sometimes they must be added in to make sense of it.'

I would be interested to see the places where it did contain them.

Bruce Metzger, R.I.P.

Bruce Metzger, an expert on the text of the New Testament (and a Ph.D. in Classics to boot!), has died. Anyone who has used the reddish-covered New Testament text published by United Bible Societies will be familiar with his name. One of the pre-eminent names in the field of biblical studies has departed from this earth.

May he rest in peace.