remove async_await feature gate

Signed-off-by: Yoshua Wuyts <yoshuawuyts@gmail.com>

README.md

@@ -38,8 +38,6 @@ $ cargo add async-std
 ## Hello world
 
 ```rust
-#![feature(async_await)]
-
 use async_std::task;
 
 fn main() {
@@ -52,8 +50,6 @@ fn main() {
 ## Low-Friction Sockets with Built-In Timeouts
 
 ```rust
-#![feature(async_await)]
-
 use std::time::Duration;
 
 use async_std::{

benches/task_local.rs

@@ -1,4 +1,4 @@
-#![feature(async_await, test)]
+#![feature(test)]
 
 extern crate test;
 

docs/src/tutorial/accept_loop.md

@@ -6,8 +6,6 @@ Let's implement the scaffold of the server: a loop that binds a TCP socket to an
 First of all, let's add required import boilerplate:
 
 ```rust
-#![feature(async_await)]
-
 use std::net::ToSocketAddrs; // 1
 
 use async_std::{

docs/src/tutorial/all_together.md

@@ -4,8 +4,6 @@
 At this point, we only need to start the broker to get a fully-functioning (in the happy case!) chat:
 
 ```rust
-#![feature(async_await)]
-
 use std::{
     net::ToSocketAddrs,
     sync::Arc,

docs/src/tutorial/handling_disconnection.md

@@ -95,8 +95,6 @@ This also allows us to establish a useful invariant that the message channel str
 The final code looks like this:
 
 ```rust
-#![feature(async_await)]
-
 use std::{
     net::ToSocketAddrs,
     sync::Arc,

docs/src/tutorial/implementing_a_client.md

@@ -15,8 +15,6 @@ Programming this with threads is cumbersome, especially when implementing clean
 With async, we can just use the `select!` macro.
 
 ```rust
-#![feature(async_await)]
-
 use std::net::ToSocketAddrs;
 
 use futures::select;

examples/hello-world.rs

@@ -1,7 +1,5 @@
 //! Spawns a task that says hello.
 
-#![feature(async_await)]
-
 use async_std::task;
 
 async fn say_hi() {

examples/line-count.rs

@@ -1,7 +1,5 @@
 //! Counts the number of lines in a file given as an argument.
 
-#![feature(async_await)]
-
 use std::env::args;
 
 use async_std::fs::File;

examples/list-dir.rs

@@ -1,7 +1,5 @@
 //! Lists files in a directory given as an argument.
 
-#![feature(async_await)]
-
 use std::env::args;
 
 use async_std::fs;

examples/logging.rs

@@ -1,7 +1,5 @@
 //! Prints the runtime's execution log on the standard output.
 
-#![feature(async_await)]
-
 use async_std::task;
 
 fn main() {

examples/print-file.rs

@@ -1,7 +1,5 @@
 //! Prints a file given as an argument to stdout.
 
-#![feature(async_await)]
-
 use std::env::args;
 
 use async_std::fs::File;

examples/stdin-echo.rs

@@ -1,7 +1,5 @@
 //! Echoes lines read on stdin to stdout.
 
-#![feature(async_await)]
-
 use async_std::io;
 use async_std::prelude::*;
 use async_std::task;

examples/stdin-timeout.rs

@@ -1,7 +1,5 @@
 //! Reads a line from stdin, or exits with an error if nothing is read in 5 seconds.
 
-#![feature(async_await)]
-
 use std::time::Duration;
 
 use async_std::io;

examples/surf-web.rs

@@ -1,7 +1,5 @@
 //! Sends an HTTP request to the Rust website.
 
-#![feature(async_await)]
-
 use async_std::task;
 
 fn main() -> Result<(), surf::Exception> {

examples/task-local.rs

@@ -1,7 +1,5 @@
 //! Creates a task-local value.
 
-#![feature(async_await)]
-
 use std::cell::Cell;
 
 use async_std::prelude::*;

examples/task-name.rs

@@ -1,7 +1,5 @@
 //! Spawns a named task that prints its name.
 
-#![feature(async_await)]
-
 use async_std::task;
 
 async fn print_name() {

examples/tcp-client.rs

@@ -12,8 +12,6 @@
 //! $ cargo run --example tcp-client
 //! ```
 
-#![feature(async_await)]
-
 use async_std::io;
 use async_std::net::TcpStream;
 use async_std::prelude::*;

examples/tcp-echo.rs

@@ -6,8 +6,6 @@
 //! $ nc localhost 8080
 //! ```
 
-#![feature(async_await)]
-
 use async_std::io;
 use async_std::net::{TcpListener, TcpStream};
 use async_std::prelude::*;

examples/udp-client.rs

@@ -12,8 +12,6 @@
 //! $ cargo run --example udp-client
 //! ```
 
-#![feature(async_await)]
-
 use async_std::io;
 use async_std::net::UdpSocket;
 use async_std::task;

examples/udp-echo.rs

@@ -6,8 +6,6 @@
 //! $ nc -u localhost 8080
 //! ```
 
-#![feature(async_await)]
-
 use async_std::io;
 use async_std::net::UdpSocket;
 use async_std::task;

src/fs/canonicalize.rs

@@ -23,7 +23,6 @@ use crate::task::blocking;
 /// # Examples
 ///
 /// ```no_run
-/// # #![feature(async_await)]
 /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
 /// #
 /// use async_std::fs;

src/fs/copy.rs

@@ -27,7 +27,6 @@ use crate::task::blocking;
 /// # Examples
 ///
 /// ```no_run
-/// # #![feature(async_await)]
 /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
 /// #
 /// use async_std::fs;

src/fs/create_dir.rs

@@ -21,7 +21,6 @@ use crate::task::blocking;
 /// # Examples
 ///
 /// ```no_run
-/// # #![feature(async_await)]
 /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
 /// #
 /// use async_std::fs;

src/fs/create_dir_all.rs

@@ -20,7 +20,6 @@ use crate::io;
 /// # Examples
 ///
 /// ```no_run
-/// # #![feature(async_await)]
 /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
 /// #
 /// use async_std::fs;

src/fs/dir_builder.rs

@@ -73,7 +73,6 @@ impl DirBuilder {
     /// # Examples
     ///
     /// ```no_run
-    /// # #![feature(async_await)]
     /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
     /// #
     /// use async_std::fs::DirBuilder;

src/fs/dir_entry.rs

@@ -74,7 +74,6 @@ impl DirEntry {
     /// # Examples
     ///
     /// ```no_run
-    /// # #![feature(async_await)]
     /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
     /// #
     /// use async_std::fs;
@@ -100,7 +99,6 @@ impl DirEntry {
     /// # Examples
     ///
     /// ```no_run
-    /// # #![feature(async_await)]
     /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
     /// #
     /// use async_std::fs;
@@ -154,7 +152,6 @@ impl DirEntry {
     /// # Examples
     ///
     /// ```no_run
-    /// # #![feature(async_await)]
     /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
     /// #
     /// use async_std::fs;
@@ -206,7 +203,6 @@ impl DirEntry {
     /// # Examples
     ///
     /// ```no_run
-    /// # #![feature(async_await)]
     /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
     /// #
     /// use async_std::fs;

src/fs/file.rs

@@ -33,7 +33,6 @@ use crate::task::{blocking, Context, Poll};
 /// Create a new file and write some bytes to it:
 ///
 /// ```no_run
-/// # #![feature(async_await)]
 /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
 /// #
 /// use async_std::fs::File;
@@ -48,7 +47,6 @@ use crate::task::{blocking, Context, Poll};
 /// Read the contents of a file into a `Vec<u8>`:
 ///
 /// ```no_run
-/// # #![feature(async_await)]
 /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
 /// #
 /// use async_std::fs::File;
@@ -124,7 +122,6 @@ impl File {
     /// # Examples
     ///
     /// ```no_run
-    /// # #![feature(async_await)]
     /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
     /// #
     /// use async_std::fs::File;
@@ -171,7 +168,6 @@ impl File {
     /// # Examples
     ///
     /// ```no_run
-    /// # #![feature(async_await)]
     /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
     /// #
     /// use async_std::fs::File;
@@ -218,7 +214,6 @@ impl File {
     /// # Examples
     ///
     /// ```no_run
-    /// # #![feature(async_await)]
     /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
     /// #
     /// use async_std::fs::File;
@@ -274,7 +269,6 @@ impl File {
     /// # Examples
     ///
     /// ```no_run
-    /// # #![feature(async_await)]
     /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
     /// #
     /// use async_std::fs::File;
@@ -334,7 +328,6 @@ impl File {
     /// # Examples
     ///
     /// ```no_run
-    /// # #![feature(async_await)]
     /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
     /// #
     /// use async_std::fs::File;
@@ -381,7 +374,6 @@ impl File {
     /// # Examples
     ///
     /// ```no_run
-    /// # #![feature(async_await)]
     /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
     /// #
     /// use async_std::fs::File;
@@ -433,7 +425,6 @@ impl File {
     /// # Examples
     ///
     /// ```no_run
-    /// # #![feature(async_await)]
     /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
     /// #
     /// use async_std::fs::File;

src/fs/hard_link.rs

@@ -22,7 +22,6 @@ use crate::task::blocking;
 /// # Examples
 ///
 /// ```no_run
-/// # #![feature(async_await)]
 /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
 /// #
 /// use async_std::fs;

src/fs/metadata.rs

@@ -22,7 +22,6 @@ use crate::task::blocking;
 /// # Examples
 ///
 /// ```no_run
-/// # #![feature(async_await)]
 /// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
 /// #
 /// use async_std::fs;

src/fs/mod.rs

@@ -9,7 +9,6 @@
 //! Create a new file and write some bytes to it:
 //!
 //! ```no_run
-//! # #![feature(async_await)]
 //! # fn main() -> std::io::Result<()> { async_std::task::block_on(async {
 //! #
 //! use async_std::fs::File;