Update templating.rst

Conflicts:
	book/templating.rst

Author: ifdattic

book/templating.rst

@@ -1509,7 +1509,7 @@ use output escaping, use the special ``escape()`` view method:
     Hello <?php echo $view->escape($name) ?>
 
 By default, the ``escape()`` method assumes that the variable is being rendered
-within a HTML context (and thus the variable is escaped to be safe for HTML).
+within an HTML context (and thus the variable is escaped to be safe for HTML).
 The second argument lets you change the context. For example, to output something
 in a JavaScript string, use the ``js`` context: