Take your icon game to the next level. Check out Fonticons, from the maker of Font Awesome.
             

fa-indent · Unicode: f03c · Created: v1.0 · Categories: Text Editor Icons

After you get up and running, you can place Font Awesome icons just about anywhere with the <i> tag:

fa-indent
<i class="fa fa-indent"></i>

Looking for more? Check out the examples.