Merge pull request #194 from d0iasm/master

Update the template source code

Author: fitzgen

src/game-of-life/hello-world.md

@@ -25,7 +25,7 @@ wasm-game-of-life
 
 ## What's Inside
 
-Enter the new `wasm-game-of-life` project 
+Enter the new `wasm-game-of-life` project
 
 ```
 cd wasm-game-of-life
@@ -61,23 +61,15 @@ WebAssembly. It uses `wasm-bindgen` to interface with JavaScript. It imports the
 alerts a greeting message.
 
 ```rust
-extern crate cfg_if;
-extern crate wasm_bindgen;
-
 mod utils;
 
-use cfg_if::cfg_if;
 use wasm_bindgen::prelude::*;
 
-cfg_if! {
-    // When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
-    // allocator.
-    if #[cfg(feature = "wee_alloc")] {
-        extern crate wee_alloc;
-        #[global_allocator]
-        static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
-    }
-}
+// When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
+// allocator.
+#[cfg(feature = "wee_alloc")]
+#[global_allocator]
+static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
 
 #[wasm_bindgen]
 extern {
@@ -88,7 +80,6 @@ extern {
 pub fn greet() {
     alert("Hello, wasm-game-of-life!");
 }
-
 ```
 
 ### `wasm-game-of-life/src/utils.rs`