docs(letter-space-number): correct grammar

subjects/letter-space-number/README.md

@@ -2,10 +2,8 @@
 
 ### Instructions
 
-Make a function called `letterSpaceNumber` that receives a string and returns an
-array with every instance of a letter, followed by a space, followed by a number
-only if that number has only one digit and is not followed by any letter.
+Create a function named `letterSpaceNumber` that accepts a string; returning an array with every instance of a letter, followed by a space, followed by a number, only if that number has only one digit, and is not followed by any letter.
 
 ### Notions
 
-- [github.com/ziishaned/learn-regex#3-shorthand-character-sets](https://github.com/ziishaned/learn-regex#3-shorthand-character-sets)
+- [RegEx Shorthand Character Sets](https://github.com/ziishaned/learn-regex#3-shorthand-character-sets)