Merge pull request #727 from irond/container_for_checkbox

Add TextRun as container for CheckBox

Author: troosan

src/PhpWord/Element/AbstractContainer.php

@@ -204,7 +204,7 @@ private function checkValidity($method)
             'ListItem'      => array('Section', 'Header', 'Footer', 'Cell', 'TextBox'),
             'ListItemRun'   => array('Section', 'Header', 'Footer', 'Cell', 'TextBox'),
             'Table'         => array('Section', 'Header', 'Footer', 'Cell', 'TextBox'),
-            'CheckBox'      => array('Section', 'Header', 'Footer', 'Cell'),
+            'CheckBox'      => array('Section', 'Header', 'Footer', 'Cell', 'TextRun'),
             'TextBox'       => array('Section', 'Header', 'Footer', 'Cell'),
             'Footnote'      => array('Section', 'TextRun', 'Cell'),
             'Endnote'       => array('Section', 'TextRun', 'Cell'),