How can I get the Twitter trending topics bold?

I don't mean bold as in changing the size. I mean in the trending section where there are topics. I know about the hashtag one (#hashtag) but I don't know how to "highlight" the other topics. Can someone PLEASE tell me how to do that? Check Twitter right now. "Pregnancy Pact" is trending. How do I make THAT bold? Been trying to figure it out for ages. Thanks!