Fix spaces

README.md

@@ -167,6 +167,7 @@ So usually the compiler can guess. But sometimes you need to tell it, for two re
 2) You want a different type (for example, you want an ```i128```, not an ```i32```).
 
 To specify a type, add a colon after the variable name.
+
 ```rust
 fn main() {
     let small_number: u8 = 10;
@@ -182,6 +183,7 @@ fn main() {
 ```
 
 You can also add ```_``` if you want to make the number easy to read.
+
 ```rust
 fn main() {
     let small_number = 10_u8; // This is easier to read
@@ -801,7 +803,6 @@ fn main() {
     println!("And an f64 is always {:?} bytes. It is Sized.", std::mem::size_of::<f64>());
     println!("But a &str? It can be anything. '서태지' is {:?} bytes. It is not Sized.", std::mem::size_of_val("서태지")); // std::mem::size_of_val() gives you the size in bytes of a variable
     println!("And 'Adrian Fahrenheit Țepeș' is {:?} bytes. It is not Sized.", std::mem::size_of_val("Adrian Fahrenheit Țepeș"));
-    
 }
 ```
 
@@ -1387,7 +1388,6 @@ fn main() {
 
     my_vec.push(name1); // Now it knows: it's Vec<String>
     my_vec.push(name2);
-
 }
 ```
 
@@ -1657,7 +1657,6 @@ You can use _ as many times as you want in a match. In this match on colours, we
 
 ```rust
 fn match_colours(rbg: (i32, i32, i32)) {
-    
     match rbg {
         (r, _, _) if r < 10 => println!("Not much red"),
         (_, b, _) if b < 10 => println!("Not much blue"),
@@ -1894,11 +1893,9 @@ fn check_skystate(state: &ThingsInTheSky) {
 }
 
 fn main() {
-    
     let time = 8; // it's 8 o'clock
     let skystate = create_skystate(time); // create_skystate returns a ThingsInTheSky
     check_skystate(&skystate); // Give it a reference so it can read the varible skystate
-
 }
 ```
 
@@ -1925,11 +1922,9 @@ fn check_skystate(state: &ThingsInTheSky) {
 }
 
 fn main() {
-    
     let time = 8; // it's 8 o'clock
     let skystate = create_skystate(time); // create_skystate returns a ThingsInTheSky
     check_skystate(&skystate); // Give it a reference so it can read the varible skystate
-
 }
 ```
 
@@ -1964,7 +1959,6 @@ impl Number {
             false => Number::I32(number), // otherwise just give the number because it's already i32
         }
     }
-    
 }
 
 fn main() {
@@ -2304,7 +2298,6 @@ Now that we know how to use loops, here is a better solution to the ```match```
 
 ```rust
 fn match_colours(rbg: (i32, i32, i32)) {
-    
     let new_vec = vec![(rbg.0, "red"), (rbg.1, "blue"), (rbg.2, "green")]; // Put the colours in a vec. Inside are tuples with the colour names
     let mut all_have_at_least_10 = true; // Start with true. We will set it to false if one colour is less than 10
     for item in new_vec {
@@ -2316,7 +2309,6 @@ fn match_colours(rbg: (i32, i32, i32)) {
     if all_have_at_least_10 { // Check if it's still true, and print if true
         println!("Each colour has at least 10.")
     }
-
 }
 
 fn main() {
@@ -2327,7 +2319,6 @@ fn main() {
     match_colours(first);
     match_colours(second);
     match_colours(third);
-
 }
 ```
 
@@ -2887,7 +2878,6 @@ fn main() {
         None => {}
       }
     }
-    
 }
 ```
 
@@ -3698,7 +3688,6 @@ fn main() {
     my_library.add_book("구운몽");
     my_library.add_book("吾輩は猫である");
 
-
     println!("{:?}", my_library.books); // we can print our list of books
 }
 ```
@@ -4321,14 +4310,12 @@ struct City {
 }
 
 fn main() {
-    
     let my_city = City {
         name: "Ichinomiya",
         date_founded: 1921,
     };
 
     println!("{} was founded in {}", my_city.name, my_city.date_founded);
-
 }
 ```
 
@@ -4342,7 +4329,6 @@ struct City {
 }
 
 fn main() {
-    
     let city_names = vec!["Ichinomiya".to_string(), "Kurume".to_string()]; // city_names does not live for the whole program
 
     let my_city = City {
@@ -4351,7 +4337,6 @@ fn main() {
     };
 
     println!("{} was founded in {}", my_city.name, my_city.date_founded);
-
 }
 ```
 
@@ -4381,7 +4366,6 @@ struct City<'a> { // City has lifetime 'a
 }
 
 fn main() {
-    
     let city_names = vec!["Ichinomiya".to_string(), "Kurume".to_string()];
 
     let my_city = City {
@@ -4390,7 +4374,6 @@ fn main() {
     };
 
     println!("{} was founded in {}", my_city.name, my_city.date_founded);
-
 }
 ```
 
@@ -4494,7 +4477,6 @@ fn main() {
 
     // 10 years later, super_phone_3000 is not on sale anymore
     super_phone_3000.on_sale.set(false);
-
 }
 ```
 
@@ -4529,7 +4511,6 @@ fn main() {
     };
 
     println!("{:?}", user_1.active);
-
 }
 ```
 
@@ -4622,7 +4603,6 @@ fn main() {
     *mutex_changer = 6; // mutex_changer is a MutexGuard<i32> so we use * to change the i32
 
     println!("{:?}", mutex_changer); // Now it says 6
-    
 }
 ```
 
@@ -4644,9 +4624,9 @@ fn main() {
 
 If you don't want to use a different ```{}``` code block, you can use ```std::mem::drop(mutex_changer)```. ```std::mem::drop``` means "make this go out of scope".
 
+```rust
 use std::sync::Mutex;
 
-```rust
 fn main() {
     let my_mutex = Mutex::new(5);
     let mut mutex_changer = my_mutex.lock().unwrap();
@@ -4672,7 +4652,6 @@ fn main() {
                                                             // and will wait forever.
 
     println!("This will never print...");
-
 }
 ```
 
@@ -4686,13 +4665,12 @@ fn main() {
     let mut mutex_changer = my_mutex.lock().unwrap();
     let mut other_mutex_changer = my_mutex.try_lock(); // try to get the lock
 
-    if let Ok(value) = other_mutex_changer { // 
+    if let Ok(value) = other_mutex_changer {
         println!("The MutexGuard has: {}", value)
     } else {
         println!("Didn't get the lock")
     }
 }
-}
 ```
 
 Also, you don't need to make a variable to change the ```Mutex```. You can just do this:
@@ -4791,7 +4769,6 @@ fn main() {
     } else {
         println!("Couldn't get write access, sorry!")
     };
-    
 }
 ```
 
@@ -4827,7 +4804,6 @@ Here is an example to test ```Cow```. We will put a number into a function that
 use std::borrow::Cow;
 
 fn modulo_3(input: u8) -> Cow<'static, str> {
-    
     match input % 3 {
         0 => "Remainder is 0".into(),
         1 => "Remainder is 1".into(),
@@ -5148,7 +5124,6 @@ fn main() {
 
     takes_a_string(user_name);
     also_takes_a_string(user_name);
-    
 }
 
 fn takes_a_string(input: String) {
@@ -5192,7 +5167,6 @@ fn main() {
     };
 
     println!("Calgary's history is: {}", calgary.city_history);
-    
 }
 ```
 
@@ -5255,7 +5229,6 @@ fn main() {
     };
 
     println!("Calgary's history is: {}", calgary.city_history);
-    
 }
 ```
 
@@ -5774,7 +5747,6 @@ fn main() {
 
     sender.send(5);
     receiver.recv();
-
 }
 ```
 
@@ -5788,7 +5760,6 @@ fn main() {
 
     sender.send(5).unwrap();
     println!("{}", receiver.recv().unwrap());
-
 }
 ```
 
@@ -5812,7 +5783,6 @@ fn main() {
     });
 
     println!("{}", receiver.recv().unwrap());
-
 }
 ```