message: MeshBuilder: Add an example call
diff: @@ -9,6 +9,16 @@ use lyon::tessellation as t;
  /// many different complex pieces of geometry. They don't
  /// have to be connected to each other, and will all be
  /// drawn at once.
  +///
  +/// The following example shows how to build a mesh containing a line and a circle:
  +///
  +/// ```rust,ignore
  +/// let mesh: Mesh = MeshBuilder::new()
  +/// .line(&[Point2::new(20.0, 20.0), Point2::new(40.0, 20.0)], 4.0)
  +/// .circle(DrawMode::Fill, Point2::new(60.0, 38.0), 40.0, 1.0)
  +/// .build(ctx)
  +/// .unwrap();
  +/// ```
  #[derive(Debug, Clone)]
  pub struct MeshBuilder {
  buffer: t::geometry_builder::VertexBuffers<Vertex>,
  