How can I remove line feed in my XML output

[MAHE Vincent FTRD/DIH/REN]

Title: How can I remove line feed in my XML output

Hello,

I have a pipeline which produces XML output with Cocoon.
I would like to remove useless line feed in the output stream in order to have a beautiful indented XML file. How is it possible ?

For instance, when I have  this :
<toto>

<titi>Hello World</titi>
</toto>

I would like to have this as output :
<toto>
  <titi>Hello World</titi>
</toto>

Thanks

Vincent