Fix some titles, sigs in ref docs (#2128)

* Fix some title and sigs in ref docs

* better buffer source

docs/reference/game/turn.md

@@ -3,15 +3,14 @@
 Turn the sprite as much as you say in the direction you say.
 
 ```sig
-let item: game.LedSprite = null;
-item.turn(Direction.Right, 45);
+game.createSprite(0, 2).turn(Direction.Right, 45);
 ```
 
 ## Parameters
 
-* a choice whether the sprite should turn **left** or **right**
-* a [number](/types/number) that means how much the sprite should turn.
-  This number is in **degrees**, so a straight left or right turn is 90 degrees.
+* **direction**: a choice whether the sprite should turn **left** or **right**
+* **degrees**: a [number](/types/number) degrees of angle that the sprite should turn.
+A straight left or right turn is 90 degrees.
 
 ## Example