Modify make_clickable URL RegEx

I would like to make a small change to WPs make_clickable RegEx for URLs so that a space og a line break is needed in front of the URL before it change the URL into a clickable one.

My RegEx knownledge is limited, but i guess that something like this should cover space and linebreak on the Linux server i am on:

( |\n)

But where do I put it in WPs RegEx:

$retval = preg_replace_callback('
#(?<!=[\'"])(?<=[*\')+.,;:!&$\s>])(\()?([\w]+?://(?:[\w\\x80-\\xff\#%~/?@\[\]-]{1,2000}|[\'*(+.,;:!=&$](?![\b\)]|(\))?([\s]|$))|(?(1)\)(?![\s<.,;:]|$)|\)))+)#is
', '_make_url_clickable_cb', $ret);

Any help is much appreciated.