Incorrect doc syntax on World get and get_mut

[afonsolage]

How can Bevy's documentation be improved?

Just noticed that World.get and World.get_mut docs are missing the closing ```

bevy/crates/bevy_ecs/src/world/mod.rs

Lines 372 to 386 in e317058

	/// ```
	/// use bevy_ecs::world::World;
	///
	/// struct Position {
	/// x: f32,
	/// y: f32,
	/// }
	///
	/// let mut world = World::new();
	/// let entity = world.spawn()
	/// .insert(Position { x: 0.0, y: 0.0 })
	/// .id();
	/// let position = world.get::<Position>(entity).unwrap();
	/// assert_eq!(position.x, 0.0);
	#[inline]

bevy/crates/bevy_ecs/src/world/mod.rs

Lines 393 to 407 in e317058

	/// ```
	/// use bevy_ecs::world::World;
	///
	/// struct Position {
	/// x: f32,
	/// y: f32,
	/// }
	///
	/// let mut world = World::new();
	/// let entity = world.spawn()
	/// .insert(Position { x: 0.0, y: 0.0 })
	/// .id();
	/// let mut position = world.get_mut::<Position>(entity).unwrap();
	/// position.x = 1.0;
	#[inline]

[alice-i-cecile]

If you're tackling this, make sure to check for conflicts with #2365.

[afonsolage]

Checked and seems to have no conflict, but if no ones picks it until the weekend, I may address it.