docs(filter): correct grammar

subjects/filter/README.md

@@ -2,25 +2,25 @@
 
 ### Instructions
 
-- Create a `filter` function that takes an array as first argument, a function as second,
-  and that works like the method [].filter
 
-- Create a `reject` function that takes an array as first argument, a function as second,
-  and that works like the reject function from lodash.
+Create the following functions, which each take an array as the first argument, and a function as the second argument.
 
-- Create a `partition` function that takes an array as first argument, a function as second,
-  and that works like the partition function from lodash.
+- `filter`: that works like the `[].filter` method.
+
+- `reject`: that works like the `reject` function from lodash.
+
+- `partition`: that works like the `partition` function from lodash.
+
+### Code provided
+
+> The provided code will be added to your solution, and does not need to be submitted.
+
+```js
+Array.prototype.filter = undefined
+```
 
 ### Notions
 
 - [devdocs.io/javascript/global_objects/array/filter](https://devdocs.io/javascript/global_objects/array/filter)
 - [lodash.com/docs/4.17.15#reject](https://lodash.com/docs/4.17.15#reject)
 - [lodash.com/docs/4.17.15#partition](https://lodash.com/docs/4.17.15#partition)
-
-### Code provided
-
-> all code provided will be added to your solution and doesn't need to be submited.
-
-```js
-Array.prototype.filter = undefined
-```