Oh, simple as that. I thought it was something like <div class="pull-center">. I use some similar things. In case you haven't seen them I'll show them to you:
This aligns the text to the right side:
<div class="pull-right">text</div>example
This lets you write the code you want without spaces:
html entities:
backticks
which looks like this: <div class="pull-right">text</div>Six spaces also works:
<div>text</div>
And to align the text to the left:
There is also pull-left which has some strange behavior:
text
text
These are particularly effective for image formatting. I've been exploring these things. I'm really glad to have found <center> today. :D