docs(how_many_references) correct grammar

subjects/how_many_references/README.md

@@ -2,17 +2,11 @@
 
 ### Instructions
 
-Create the following **functions** :
+Create the following **functions**:
 
-- `add_ele` which adds an element to the value in the `Node`
-- `how_many_references` which returns how many times the value is referenced in the code
-- `rm_all_ref` which receives a `Rc<String>` and removes all elements from the vector that
-  are equal to that value, this should only happen if the two Rcs point to the same allocation
-
-### Notions
-
-- [Reference Counted Smart Pointer](https://doc.rust-lang.org/book/ch15-04-rc.html)
-- [Struct std::rc::Rc](https://doc.rust-lang.org/std/rc/struct.Rc.html)
+- `add_ele`: which adds an element to the value in the `Node`.
+- `how_many_references`: which returns how many times the value is referenced in the code.
+- `rm_all_ref`: which accepts an `Rc<String>` and removes all elements from the vector that are equal to that value. This should only happen if the two `Rc`s point to the same allocation.
 
 ### Expected Functions and structures
 
@@ -78,3 +72,8 @@ b: 2
 c: 2
 $
 ```
+
+### Notions
+
+- [Reference Counted Smart Pointer](https://doc.rust-lang.org/book/ch15-04-rc.html)
+- [Struct std::rc::Rc](https://doc.rust-lang.org/std/rc/struct.Rc.html)