Description:
------------
if i concat some strings like $string .= ' ' . (true)? asd : foo ;
the whitespace is always missing..
see code snipped!

Test script:
---------------
<?php
class test {
    public $data = array();
    public function __construct() {
      
      $this->data["sort"] = "erstellt";
      $this->data["order"] = "1";
      
      $order = null;
      if (isset($this->data["sort"])) {
          $order = $this->data["sort"];
          if (isset($this->data["order"])) $order .= ' ' . ($this->data["order"] == 1) ? "desc" : "asc";
      }
      echo $order;
      //returns erstelltdesc

      echo "\n------------------------------\n";
      
      $order = null;
      if (isset($this->data["sort"])) {
          $order = $this->data["sort"];
          if (isset($this->data["order"]))  {
              $order .= ' ';
              $order .= ($this->data["order"] == 1) ? "desc" : "asc";
          }
      }
      echo $order;
      //returns erstellt desc
    }
}
new test()
?> 

Expected result:
----------------
erstellt desc
------------------------------
erstellt desc

Actual result:
--------------
erstelltdesc
------------------------------
erstellt desc