Made the file name sentence more readable

Made changes according to the review, made the file name more readable and some minor grammatical changes.

Author: Sama-004

03_reverseString/README.md

@@ -6,7 +6,7 @@ Pretty simple, write a function called `reverseString` that returns its input, r
 reverseString('hello there') // returns 'ereht olleh'
 ```
 
-You will notice in this exercise that there are multiple tests (see in file reverseString.spec.js). Only the first test is currently enabled. So after making sure that this first one passes, enable the others one by one by deleting the .skip from the test.skip() function.
+You will notice in this exercise that there are multiple tests (in the file `reverseString.spec.js`). Currently, only the first test is enabled. After ensuring that the first test passes, enable the remaining tests one by one by removing the `.skip` from the `test.skip()` function.
 
 
 ## Hints