ui_game_user_interface: Small fixes from PR #1174

getting_started/step_by_step/ui_game_user_interface.rst

@@ -56,7 +56,7 @@ we can jump into Godot and create our GUI.
 Create the base GUI
 -------------------
 
-There 2 possible approaches to the GUI: we can design elements in
+There are two possible approaches to the GUI: we can design elements in
 separate scenes and put them together, or prototype everything in a
 single scene and break it down later. I recommend working with a single
 scene as you can play with your UI's placement and proportions faster
@@ -574,7 +574,7 @@ centers inside the ``HBoxContainer``.
 We have one small issue left with the EP label on the EnergyBar: the 2
 bars should align vertically. Click the icon next to the ``EnergyBar``
 node to open its scene. Select the ``Count`` node and scroll down to the
-``Custom Constant`` section. As a add a ``Margin Left`` of ``20``. In
+``Custom Constant`` section. Add a ``Margin Left`` of ``20``. In
 the ``Rect`` section set the node's ``Min Size`` back to 100, the same
 value as on the LifeBar. The ``Count`` should now have some margin on
 the left. If you save and go back to the GUI scene, it will be aligned