docs(fibonacci2): correct grammar

subjects/fibonacci2/README.md

@@ -4,27 +4,15 @@
 
 Complete the body of the **function** `fibonacci`.
 
-This function receives a number `n` and returns the `n`th number in the fibonacci series.
-
-The Fibonacci Series starts like this: 0, 1, 1, 2, 3, 5, 8, 13 etc...
-
-### Recommendation
-
-Videos designed to give **hints** are assigned to each quest. It is strongly suggested to watch them as you go.
-
-### Notions
-
-- [Primitives](https://doc.rust-lang.org/stable/rust-by-example/primitives.html)
-- [Functions](https://doc.rust-lang.org/stable/rust-by-example/fn.html)
-
-### Expected function
-
 ```rust
  pub fn fibonacci(n: u32) -> u32 {
-
  }
 ```
 
+This function receives a number `n` and returns the `n`th number in the fibonacci series.
+
+The Fibonacci Series starts like this: 0, 1, 1, 2, 3, 5, 8, 13 etc...
+
 ### Usage
 
 Here is a possible test for your function:
@@ -50,3 +38,8 @@ The element in the position 22 in fibonacci series is 17711
 The element in the position 20 in fibonacci series is 6765
 $
 ```
+
+### Notions
+
+- [Primitives](https://doc.rust-lang.org/stable/rust-by-example/primitives.html)
+- [Functions](https://doc.rust-lang.org/stable/rust-by-example/fn.html)