Finish HTMLDTD_ChildDef_Required.

Fix bug in HTML_Generator that resulted in attribute-less empty elements to have extra spaces in them.

Add whitespace designation to MF_Text.

git-svn-id: http://htmlpurifier.org/svnroot/html_purifier/trunk@44 48356398-32a2-884e-a903-53898d9a118a

tests/HTML_Generator.php

@@ -30,6 +30,9 @@ class Test_HTML_Generator extends UnitTestCase
         $inputs[4] = new MF_StartTag('asdf');
         $expect[4] = '<asdf>';
         
+        $inputs[5] = new MF_EmptyTag('br');
+        $expect[5] = '<br />';
+        
         foreach ($inputs as $i => $input) {
             $result = $this->gen->generateFromToken($input);
             $this->assertEqual($result, $expect[$i]);