How to combine html spans?

[gamerfu]

HTML Usermarkup: How do I combine these two spans?

<span style="text-decoration: none; font-weight: bold; color: red;">AA</span><span style="text-decoration: none; font-weight: bold;">Username</span>

I am trying to add this to Usermarkup.

[Lynne]

I suppose you could go:
<span style="text-decoration: none; font-weight: bold;"><span style="color: red;">AA</span>Username</span>