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Although you cannot add formatting in the traditional sense using HTML markup you can apply some formatting by using unicode character. The easiest way I know to do this is with yaytext.com. The following is their description of what you can do: YayText Super cool unicode text magic. Write 𝐛𝐨𝐥𝐝 and/or 𝑖𝑡𝑎𝑙𝑖𝑐 updates on Facebook, Twitter, and ...

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