Update lazy-objects.xml Add the missing dot char (#4004)

Author: mmalferov

language/oop5/lazy-objects.xml

@@ -263,7 +263,7 @@ var_dump($post->id);
     Listing properties with
     <methodname>ReflectionObject::getProperties</methodname>,
     <methodname>ReflectionObject::getProperty</methodname>,
-    <function>get_object_vars</function>
+    <function>get_object_vars</function>.
    </member>
    <member>
     Iterating over properties of an object that does not implement