ignore running some code, fix edition for other part of code

Author: funkill

src/01_getting_started/02_why_async.md

@@ -8,7 +8,7 @@ thread. In a typical threaded application, if you wanted to download two
 different webpages at the same time, you would spread the work across two
 different threads, like this:
 
-```rust
+```rust,ignore
 {{#include ../../examples/01_02_why_async/src/lib.rs:get_two_sites}}
 ```
 
@@ -22,7 +22,7 @@ to eliminate. We can rewrite the function above using Rust's
 `async`/`.await` notation, which will allow us to run multiple tasks at
 once without creating multiple threads:
 
-```rust
+```rust,ignore
 {{#include ../../examples/01_02_why_async/src/lib.rs:get_two_sites_async}}
 ```
 

src/01_getting_started/04_async_await_primer.md

@@ -9,14 +9,14 @@ blocked `Future`s will yield control of the thread, allowing other
 
 To create an asynchronous function, you can use the `async fn` syntax:
 
-```rust
-async fn do_something() { ... }
+```rust,edition2018
+async fn do_something() { /* ... */ }
 ```
 
 The value returned by `async fn` is a `Future`. For anything to happen,
 the `Future` needs to be run on an executor.
 
-```rust
+```rust,edition2018
 {{#include ../../examples/01_04_async_await_primer/src/lib.rs:hello_world}}
 ```
 
@@ -29,16 +29,16 @@ other tasks to run if the future is currently unable to make progress.
 For example, imagine that we have three `async fn`: `learn_song`, `sing_song`,
 and `dance`:
 
-```rust
-async fn learn_song() -> Song { ... }
-async fn sing_song(song: Song) { ... }
-async fn dance() { ... }
+```rust,ignore
+async fn learn_song() -> Song { /* ... */ }
+async fn sing_song(song: Song) { /* ... */ }
+async fn dance() { /* ... */ }
 ```
 
 One way to do learn, sing, and dance would be to block on each of these
 individually:
 
-```rust
+```rust,ignore
 {{#include ../../examples/01_04_async_await_primer/src/lib.rs:block_on_each}}
 ```
 
@@ -48,7 +48,7 @@ we can sing it, but it's possible to dance at the same time as learning and
 singing the song. To do this, we can create two separate `async fn` which
 can be run concurrently:
 
-```rust
+```rust,ignore
 {{#include ../../examples/01_04_async_await_primer/src/lib.rs:block_on_main}}
 ```
 

src/01_getting_started/05_http_server_example.md

@@ -15,14 +15,14 @@ Let's add some dependencies to the `Cargo.toml` file:
 Now that we've got our dependencies out of the way, let's start writing some
 code. We have some imports to add:
 
-```rust
+```rust,ignore
 {{#include ../../examples/01_05_http_server/src/lib.rs:imports}}
 ```
 
 Once the imports are out of the way, we can start putting together the
 boilerplate to allow us to serve requests:
 
-```rust
+```rust,ignore
 {{#include ../../examples/01_05_http_server/src/lib.rs:boilerplate}}
 ```
 
@@ -35,7 +35,7 @@ You can also inspect the request itself, which contains information such as
 the request URI, HTTP version, headers, and other metadata. For example, we
 can print out the URI of the request like this:
 
-```rust
+```rust,ignore
 println!("Got request at {:?}", req.uri());
 ```
 
@@ -47,14 +47,14 @@ request to another website using Hyper's HTTP client.
 
 We start by parsing out the URL we want to request:
 
-```rust
+```rust,ignore
 {{#include ../../examples/01_05_http_server/src/lib.rs:parse_url}}
 ```
 
 Then we can create a new `hyper::Client` and use it to make a `GET` request,
 returning the response to the user:
 
-```rust
+```rust,ignore
 {{#include ../../examples/01_05_http_server/src/lib.rs:get_request}}
 ```