docs: add () after method name

Author: kenjis

user_guide_src/source/outgoing/view_renderer.rst

@@ -118,7 +118,7 @@ Several options can be passed to the ``render()`` or ``renderString()`` methods:
 -   ``cache_name`` - the ID used to save/retrieve a cached view result; defaults to the viewpath; ignored for ``renderString()``
 -   ``saveData`` - true if the view data parameters should be retained for subsequent calls
 
-.. note:: ``saveData`` as defined by the interface must be a boolean, but implementing
+.. note:: ``saveData()`` as defined by the interface must be a boolean, but implementing
     classes (like ``View`` below) may extend this to include ``null`` values.
 
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