Improve readme for older exercises

rust/tests/fibonacci2_test/src/main.rs

@@ -1,5 +1,28 @@
 use fibonacci2::*;
 
+fn main() {
+	println!(
+		"The element in the position {} in fibonacci series is {}",
+		2,
+		fibonacci(2)
+	);
+	println!(
+		"The element in the position {} in fibonacci series is {}",
+		4,
+		fibonacci(4)
+	);
+	println!(
+		"The element in the position {} in fibonacci series is {}",
+		22,
+		fibonacci(22)
+	);
+	println!(
+		"The element in the position {} in fibonacci series is {}",
+		20,
+		fibonacci(20)
+	);
+}
+
 #[test]
 fn it_works() {
 	assert_eq!(fibonacci(0), 0);

subjects/fibonacci2/README.md

@@ -21,17 +21,25 @@ The Fibonacci Series starts like this: 0, 1, 1, 2, 3, 5, 8, 13... so fibonacci(2
 
 Here is a possible test for your function:
 
-```
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        assert_eq!(fibonacci(2), 1);
-        assert_eq!(fibonacci(4), 1);
-        assert_eq!(fibonacci(22), 17711);
-        assert_eq!(fibonacci(20), 6765);
-    }
+```rust
+use fibonacci2::fibonacci;
+
+fn main() {
+    println!("The element in the position {} in fibonacci series is {}",2,  fibonacci(2));
+    println!("The element in the position {} in fibonacci series is {}",4, fibonacci(4));
+    println!("The element in the position {} in fibonacci series is {}",22, fibonacci(22));
+    println!("The element in the position {} in fibonacci series is {}", 20, fibonacci(20));
 }
 ```
+
+And its output:
+
+```console
+student@ubuntu:~/[[ROOT]]/test$ cargo run
+The element in the position 2 in fibonacci series is 1
+The element in the position 4 in fibonacci series is 3
+The element in the position 22 in fibonacci series is 17711
+The element in the position 20 in fibonacci series is 6765
+student@ubuntu:~/[[ROOT]]/test$
+```
+

subjects/groceries/README.md

@@ -6,6 +6,10 @@ Create a function called `insert` that inserts a new element at the end of the V
 
 And another function `at_index` that returns the value found at the index passed as an argument
 
+### Notions
+
+[Common Collections]( https://doc.rust-lang.org/stable/book/ch08-00-common-collections.html)
+
 ### Expected Functions
 
 ```rust
@@ -18,6 +22,8 @@ pub fn at_index(vec: &Vec<String>, index: ) -> String {
 
 ### Usage
 
+Here is a possible program to test your function:
+
 ```rust
 use groceries::{insert, at_index}
 
@@ -39,7 +45,9 @@ fn main() {
 
 And its output:
 
-```rust
+```console
+student@ubuntu:~/[[ROOT]]/test$ cargo run
 The groceries list now = ["yogurt", "panetone", "bread", "cheese", "nuts"]
 The second element of the grocery  list is "panetone"
+student@ubuntu:~/[[ROOT]]/test$
 ```

subjects/reverse_string/README.md

@@ -13,24 +13,28 @@ pub fn rev_str(input: &str) -> String {
 
 ### Usage
 
+Here is a possible program to test your function :
+
 ```rust
 use reverse_string::rev_str;
 
 fn main() {
-	println!("{}", rev_str("Hello, world!"));
-	println!("{}", rev_str("Hello, my name is Roman"));
-	println!("{}", rev_str("I have a nice car!"));
-	println!("{}", rev_str("How old are You"));
-	println!("{}", rev_str("ex: this is an example água"));
+    println!("{}", rev_str("Hello, world!"));
+    println!("{}", rev_str("Hello, my name is Roman"));
+    println!("{}", rev_str("I have a nice car!"));
+    println!("{}", rev_str("How old are You"));
+    println!("{}", rev_str("ex: this is an example água"));
 }
 ```
 
 And it's output:
 
 ```console
+student@ubuntu:~/[[ROOT]]/test$ cargo run
 !dlrow ,olleH
 namoR si eman ym ,olleH
 !rac ecin a evah I
 uoY era dlo woH
 augá elpmaxe na si siht :xe
+student@ubuntu:~/[[ROOT]]/test$
 ```