Update article.md

"by the way" -> "along the way"
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@ -312,7 +312,7 @@ If you're reading the tutorial for the first time - this section may be skipped.
It's about the internal mechanisms behind inheritance and `super`.
```
Let's get a little deeper under the hood of `super`. We'll see some interesting things by the way.
Let's get a little deeper under the hood of `super`. We'll see some interesting things along the way.
First to say, from all that we've learned till now, it's impossible for `super` to work at all!