generateSLD - space matters

[Stefanie Weykam]

Re: my previous message on supposed generateSLD bug...

That's it - spaces between the operators !

this works:
  $clObj2->setExpression('(['.$sp.']> 20 And ['.$sp.']<= 40)'); 

while this didn't:
  $clObj2->setExpression('(['.$sp.']>20 And ['.$sp.']<=40)');