Use code style in example/future as in stream's

Author: kpp

examples/future.rs

@@ -2,12 +2,12 @@ use futures::executor;
 use futures_async_combinators::future::*;
 
 fn main() {
-    executor::block_on(async {
-        let future = ready(Ok::<i32, i32>(1));
-        let future = and_then(future, |x| ready(Ok::<i32, i32>(x + 3)));
-        let future = inspect(future, |x| {
-            dbg!(x);
-        });
-        assert_eq!(future.await, Ok(4));
+    let future = ready(Ok::<i32, i32>(1));
+    let future = and_then(future, |x| ready(Ok::<i32, i32>(x + 3)));
+    let future = inspect(future, |x| {
+        dbg!(x);
     });
+
+    let res = executor::block_on(future);
+    assert_eq!(res, Ok(4));
 }