General proofreading (#1262)

* General proofreading for grammar and spelling
* General formatting
* Addition of appropriate literals where appropriate, i.e. `&"foo"` for `StringName` cases and `^"foo/bar"` for `NodePath` cases

xr/openxr_origin_centric_movement/README.md

@@ -1,6 +1,6 @@
 # XR Origin Centric Movement demo
 
-This is a demo for an OpenXR project where player movement is handled with a XRorigin3D as a base node.
+This is a demo for an OpenXR project where player movement is handled with an XRorigin3D as a base node.
 This is based on the [Origin centric solution as explained in the room scale manual page](https://docs.godotengine.org/en/stable/tutorials/xr/xr_room_scale.html#origin-centric-solution).
 
 Language: GDScript

xr/openxr_origin_centric_movement/objects/black_out.gd

@@ -14,7 +14,7 @@ func _update_fade() -> void:
 		$MeshInstance3D.visible = false
 	else:
 		if material:
-			material.set_shader_parameter("albedo", Color(0.0, 0.0, 0.0, fade))
+			material.set_shader_parameter(&"albedo", Color(0.0, 0.0, 0.0, fade))
 		$MeshInstance3D.visible = true
 
 

xr/openxr_origin_centric_movement/player.gd

@@ -42,17 +42,19 @@ func recenter() -> void:
 	# Recenter character body.
 	character_body.transform = Transform3D()
 
+
 # `_get_movement_input()` returns our move input by querying the move action on each controller.
 func _get_movement_input() -> Vector2:
 	var movement : Vector2 = Vector2()
 
 	# If move is not bound to one of our controllers,
 	# that controller will return `Vector2.ZERO`.
-	movement += $LeftHand.get_vector2("move")
-	movement += $RightHand.get_vector2("move")
+	movement += $LeftHand.get_vector2(&"move")
+	movement += $RightHand.get_vector2(&"move")
 
 	return movement
 
+
 # `_process_on_physical_movement` handles the physical movement of the player
 # adjusting our character body position to "catch up to" the player.
 # If the character body encounters an obstruction our view will black out