docs(quantifiers): correct grammar

subjects/quantifiers/README.md

@@ -2,26 +2,22 @@
 
 ### Instructions
 
-Create three functions that receive an array and a function each:
-
-- `every` that returns true if every element of the array respects the
-  condition of the received function and false otherwise.
-- `some` that returns true if at least one element of the array respects the
-  condition of the received function and false otherwise.
-- `none` that returns true if none of the elements of the array respects the
-  condition of the received function and false otherwise.
+Create these functions which receive an array and a function each. Each element will return `true` if
+- `every`: every element in the array respects the condition of the function.
+- `some`: that returns `true` if at least one element in the array respects the condition of the function.
+- `none`: that returns `true` if **none** of the elements in the array respects the condition of the function.
 
 The use of `[].every` and `[].some` is forbidden for this exercise.
 
+### Code provided
+
+> The provided code will be added to your solution, and does not need to be submitted.
+
+```js
+Array.prototype.some = Array.prototype.every = undefined
+```
+
 ### Notions
 
 - [devdocs.io/javascript/global_objects/array/some](https://devdocs.io/javascript/global_objects/array/some)
 - [devdocs.io/javascript/global_objects/array/every](https://devdocs.io/javascript/global_objects/array/every)
-
-### Code provided
-
-> all code provided will be added to your solution and doesn't need to be submited.
-
-```js
-Array.prototype.some = Array.prototype.every = undefined
-```