Removing line breaks in the source

I like to remove line breaks in the source...
Example:

A user enters a list with the editor, like:
* sample 1
* sample 2
* sample 3

Looking a the source you'll find:

<ul>
    <li>sample 1</li>
    <li>sample 2</li>
    <li>sample 3</li>
</ul>

I like to remove the line breaks in the code, so the code will look like this:

<ul><li>sample 1</li><li>sample 2</li><li>sample 3</li></ul>

It must be something simple to do? I tried setting: FCKConfig.FormatSource or FCKConfig.FormatOutput to False, but this didn't do anything.
Any suggestions?
Thanks!