rt: fix Builder docs to no longer use deprecated methods
@@ -28,24 +28,28 @@ use tokio_timer::timer::{self, Timer};
/// # Examples
///
/// ```
-/// # extern crate tokio;
-/// # extern crate tokio_threadpool;
-/// # use tokio::runtime::Builder;
+/// extern crate tokio;
+/// extern crate tokio_timer;
///
-/// # pub fn main() {
-/// // create and configure ThreadPool
-/// let mut threadpool_builder = tokio_threadpool::Builder::new();
-/// threadpool_builder
-/// .name_prefix("my-runtime-worker-")
-/// .pool_size(4);
+/// use std::time::Duration;
///
+/// use tokio::runtime::Builder;
+/// use tokio_timer::clock::Clock;
+///
+/// fn main() {
/// // build Runtime
-/// let runtime = Builder::new()
-/// .threadpool_builder(threadpool_builder)
-/// .build();
-/// // ... call runtime.run(...)
-/// # let _ = runtime;
-/// # }
+/// let mut runtime = Builder::new()
+/// .blocking_threads(4)
+/// .clock(Clock::system())
+/// .core_threads(4)
+/// .keep_alive(Some(Duration::from_secs(60)))
+/// .name_prefix("my-custom-name-")
+/// .stack_size(3 * 1024 * 1024)
+/// .build()
+/// .unwrap();
+///
+/// // use runtime ...
+/// }
/// ```
#[derive(Debug)]
pub struct Builder {
