Fixed missing semicolons and spelling mistakes in basic-types functions

en/src/basic-types/functions.md

@@ -3,13 +3,13 @@
 ```rust,editable
 
 fn main() {
-    // don't modify the following two lines!
+    // Don't modify the following two lines!
     let (x, y) = (1, 2);
     let s = sum(x, y);
 
     assert_eq!(s, 3);
 
-    println!("Success!")
+    println!("Success!");
 }
 
 fn sum(x, y: i32) {
@@ -24,9 +24,9 @@ fn main() {
    print();
 }
 
-// replace i32 with another type
+// Replace i32 with another type
 fn print() -> i32 {
-   println!("Success!")
+   println!("Success!");
 }
 ```
 
@@ -34,16 +34,16 @@ fn print() -> i32 {
 3. 🌟🌟🌟
 
 ```rust,editable
-// solve it in two ways
+// Solve it in two ways
 // DON'T let `println!` works
 fn main() {
     never_return();
 
-    println!("Failed!")
+    println!("Failed!");
 }
 
 fn never_return() -> ! {
-    // implement this function, don't modify the fn signatures
+    // Implement this function, don't modify the fn signatures
     
 }
 ```
@@ -90,11 +90,11 @@ fn main() {
         // Diverging functions can also be used in match expression to replace a value of any value
         false => {
             println!("Success!");
-            panic!("we have no value for `false`, but we can panic")
+            panic!("we have no value for `false`, but we can panic");
         }
     };
 
-    println!("Excercise Failed if printing out this line!");
+    println!("Exercise Failed if printing out this line!");
 }
 ```