Fixed typo in user_guide/annotations.rst
Added missing comma to example code as described in Issue
@@ -168,7 +168,7 @@ text, as well as the border and background of the bounding box for the text:
.. code-block:: python
- Label(x=70, y=70, x_units='screen' text='Some Stuff', render_mode='css',
+ Label(x=70, y=70, x_units='screen', text='Some Stuff', render_mode='css',
border_line_color='black', border_line_alpha=1.0,
background_fill_color='white', background_fill_alpha=1.0)
