Fix typos

kcl-book/src/sketch2d.md

@@ -27,7 +27,7 @@ startSketchOn(XY)
   |> startProfile(at = [0, 0])
   |> line(end = [3, 0])
   |> line(end = [0, 4])
-  |> line(endAbsolute = [0, 0]))
+  |> line(endAbsolute = [0, 0])
   |> close()
 ```
 

kcl-book/src/sketch3d.md

@@ -75,7 +75,7 @@ There's an optional argument called `angle`. In the above example, we didn't pro
 ```kcl=donut240
 startSketchOn(XZ)
   |> circle(center = [-200, 0], radius = 100)
-  |> revolve(axis = Y)
+  |> revolve(axis = Y, angle = 240)
 ```
 
 ![The circle, revolved partway around the axis, to make part of a donut](images/dynamic/donut240.png)