fix doc

docs/elements.rst

@@ -135,12 +135,12 @@ Text breaks are empty new lines. To add text breaks, use the following syntax. A
 Page breaks
 ~~~~~~~~~~~
 
-There are two ways to insert a page breaks, using the ``addPageBreak``
+There are two ways to insert a page break, using the ``addPageBreak``
 method or using the ``pageBreakBefore`` style of paragraph.
 
-:: code-block:: php
+.. code-block:: php
 
-    \\$section->addPageBreak();
+    $section->addPageBreak();
 
 Lists
 -----

src/PhpWord/Element/AbstractElement.php

@@ -73,7 +73,7 @@ abstract class AbstractElement
     /**
      * Unique Id for element
      *
-     * @var int
+     * @var string
      */
     protected $elementId;