How do people reply with italics on message boards? Gamefaqs, for example?

On these bulletin board type sites, people often will reply to a certain part of something. An example,

First poster: I love The Beatles. They are the best sports team ever.

Replying poster: "They are the best sports team ever"
They were a band, not a sports team.

People usually put what was already said in italics, I put it in quotes. How do they do this?

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