Missing default value for MARKDOWN_ESCAPED constant

Also removed stray trailing whitespace in Helper.php

app/Core/Helper.php

@@ -502,7 +502,7 @@ class Helper
     public function markdown($text, array $link = array())
     {
         $parser = new Markdown($link, $this);
-        $parser->setMarkupEscaped(MARKDOWN_ESCAPED);        
+        $parser->setMarkupEscaped(MARKDOWN_ESCAPED);
         return $parser->text($text);
     }
 

app/constants.php

@@ -74,3 +74,5 @@ defined('ENABLE_XFRAME') or define('ENABLE_XFRAME', true);
 // Default files directory
 defined('FILES_DIR') or define('FILES_DIR', 'data/files/');
 
+// Escape html inside markdown text
+define('MARKDOWN_ESCAPED', true);