Merge in PHP5 strict changes that are applicable to PHP4.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@650 48356398-32a2-884e-a903-53898d9a118a

tests/Debugger.php

@@ -70,6 +70,9 @@ class Debugger
         $this->add_pre = !extension_loaded('xdebug');
     }
     
+    /**
+     * @static
+     */
     function &instance() {
         static $soleInstance = false;
         if (!$soleInstance) $soleInstance = new Debugger();