docs(nasa): correct grammar

subjects/nasa/README.md

@@ -2,14 +2,13 @@
 
 ### Instructions
 
-Create a `nasa` function that takes a number `N` as a parameter and returns
-a string with all numbers from 1 to the `N` separated by whitespace, with three exceptions:
+Create a function named `nasa` that takes a number `N` as an argument and returns a string with all numbers from 1 to `N` separated by spaces. There are three exceptions:
 
-- For numbers divisible by 3, add 'NA'.
-- For numbers divisible by 5, add 'SA'.
-- For the number that are divisible by 3 and 5 add 'NASA'.
+- Convert numbers which are divisible by 3 to `"NA"`.
+- Convert numbers which are divisible by 5 to `"SA"`.
+- Convert numbers which are divisible by 3 *and* 5 to `"NASA"`.
 
 ### Notions
 
-- [nan-academy.github.io/js-training/examples/loops](https://nan-academy.github.io/js-training/examples/loops.js)
-- [nan-academy.github.io/js-training/examples/recursion](https://nan-academy.github.io/js-training/examples/recursion.js)
+- [Loops](https://nan-academy.github.io/js-training/examples/loops.js)
+- [Recursion](https://nan-academy.github.io/js-training/examples/recursion.js)