Update article.md

1-js/06-advanced-functions/01-recursion/article.md

@@ -68,7 +68,7 @@ pow(x, n) =
 ```
 
 1. If `n == 1`, then everything is trivial. It is called *the base* of recursion, because it immediately produces the obvious result: `pow(x, 1)` equals `x`.
-2. Otherwise, we can represent `pow(x, n)` as `x * pow(x, n-1)`. In maths, one would write <code>x<sup>n</sup> = x * x<sup>n-1</sup></code>. This is called *a recursive step*: we transform the task into a simpler action (multiplication by `x`) and a simpler call of the same task (`pow` with lower `n`). Next steps simplify it further and further untill `n` reaches `1`.
+2. Otherwise, we can represent `pow(x, n)` as `x * pow(x, n - 1)`. In maths, one would write <code>x<sup>n</sup> = x * x<sup>n-1</sup></code>. This is called *a recursive step*: we transform the task into a simpler action (multiplication by `x`) and a simpler call of the same task (`pow` with lower `n`). Next steps simplify it further and further until `n` reaches `1`.
 
 We can also say that `pow` *recursively calls itself* till `n == 1`.
 
@@ -134,7 +134,7 @@ We can sketch it as:
   </li>
 </ul>
 
-That's when the function starts to execute. The condition `n == 1` is falsy, so the flow continues into the second branch of `if`:
+That's when the function starts to execute. The condition `n == 1` is false, so the flow continues into the second branch of `if`:
 
 ```js run
 function pow(x, n) {
@@ -395,7 +395,7 @@ A company *department* is:
 - Either an array of people.
 - Or an object with *departments*.
 
-For web-developers there are much better known examples: HTML and XML documents.
+For web-developers there are much better-known examples: HTML and XML documents.
 
 In the HTML document, an *HTML-tag* may contain a list of:
 - Text pieces.