When I copy and past text in a chat window there is a line of information that appears that describes the font and other information related to the pasted information. How do I stop that from displaying?

When I copy and paste this is what appear: @font-face { font-family: "Arial"; }@font-face { font-family: "ＭＳ 明朝"; }@font-face { font-family: "ＭＳ 明朝"; }@font-face { font-family: "Cambria"; }p.MsoNormal, li.MsoNormal, div.MsoNormal { margin: 0in 0in 0.0001pt; font-size: 12pt;