clarifications and notions

subjects/borrow_me_the_reference/README.md

@@ -7,7 +7,11 @@ needing garbage collector. Therefore you must understand ownership in rust.
 
 Create the following functions :
 
-  - `delete_and_backspace`, imagine that `-` represents the backspace key and the `+` represents the delete key, this function must receive a borrowed string and turn this string into the string without the backspaces and the deletes. 
+  - `delete_and_backspace`, imagine that the `-` represents the `backspace key` and the `+` represents the `delete key`, this function must receive a borrowed string and turn this string into the string that applies the `backspaces` and the `deletes`.
+  - For example:
+	- "helll-o" turns into "hello"
+  
+  	- "he+lllo" turns into "hello"
 
   - `is_correct` that borrows a Vector of string literals with some correct and incorrect math equations and replaces the correct equations with `✔` and the wrong with `✘` and returns a `usize` with the percentage of correct equations.
 	

subjects/changes/README.md

@@ -2,11 +2,16 @@
 
 ### Instructions
 
-Imagine you are working in a software to control smart lights in a house. You have access to an array of all the lights in a house.
+Imagine you are working on a software to control smart lights in a house. You have access to an array of all the lights in a house.
 
-Define the associated function `new` to the data structure `Light` which creates a new light with the alias passed in the arguments and a brightness of 0.
+Define the associated **function** `new` to the data structure `Light` which creates a new light with the alias passed in the arguments and a brightness of 0.
 
-Define the function `change_brightness` that receives a Vec of lights, an alias and a u8 value and sets the u8 value as the new brightness of the light identified by the alias in the Vec of lights.
+Define the **function** `change_brightness` that receives a `Vec` of lights, an `alias` and a `u8`value.  The **function** then sets the `u8` value as the new brightness of the light identified by the alias in the Vec of lights.
+
+### Notions
+
+[Example of Structs](https://doc.rust-lang.org/book/ch05-02-example-structs.html)
+[Keyword Self](https://doc.rust-lang.org/std/keyword.Self.html)
 
 ### Expected Functions and Structure
 
@@ -31,6 +36,8 @@ pub fn change_brightness(lights: &mut Vec<Light>, alias: &str, value: u8) {
 Here is an incomplete program to test your function
 
 ```rust
+use changes::*;
+
 fn main() {
 	// bedroom
 	let mut lights = vec![