Fix Typo in Readme

README.md

@@ -81,7 +81,7 @@ fn main() {
 
 This produces the following output when run:
 
-```
+```sh
 % cargo run
 serialized vec: "[1,2]"
 deserialized vec: [1, 2]
@@ -123,7 +123,7 @@ serde_json = "*"
 ```
 
 Next, we define our source file, `src/main.rs.in`. Note this is a different
-extension than usual becaues we need to do code generation:
+extension than usual because we need to do code generation:
 
 ```rust,ignore
 #[derive(Serialize, Deserialize, Debug)]
@@ -175,7 +175,7 @@ pub fn main() {
 
 All this produces this when run:
 
-```
+```sh
 % cargo run
 {"x":1,"y":2}
 Point { x: 1, y: 2 }
@@ -232,7 +232,7 @@ fn main() {
 
 This also produces the same output:
 
-```
+```sh
 % cargo run
 {"x":1,"y":2}
 Point { x: 1, y: 2 }
@@ -314,14 +314,14 @@ The `src/main.rs.in` is the same as before.
 
 Then to run with stable:
 
-```
+```sh
 % cargo build
 ...
 ```
 
 Or with nightly:
 
-```
+```sh
 % cargo build --features nightly --no-default-features
 ...
 ```