PHPCS fixes

Author: garethellis36

src/PhpWord/Shared/Html.php

@@ -177,7 +177,9 @@ private static function parseChildNodes($node, $element, $styles, $data)
             $cNodes = $node->childNodes;
             if (count($cNodes) > 0) {
                 foreach ($cNodes as $cNode) {
-                    self::parseNode($cNode, $element, $styles, $data);
+                    if ($element instanceof AbstractContainer) {
+                        self::parseNode($cNode, $element, $styles, $data);
+                    }
                 }
             }
         }
@@ -230,9 +232,11 @@ private static function parseText($node, $element, &$styles)
     {
         $styles['font'] = self::parseInlineStyle($node, $styles['font']);
 
-        if (is_callable(array($element, 'addText'))) {
+        // Commented as source of bug #257. `method_exists` doesn't seems to work properly in this case.
+        // @todo Find better error checking for this one
+        // if (method_exists($element, 'addText')) {
             $element->addText($node->nodeValue, $styles['font'], $styles['paragraph']);
-        }
+        // }
 
         return null;
     }