Fix grammatical error

The sentence should say "Why we need tests" with no question mark, or "Why do we need tests?" I think keeping the question mark makes it more personal.
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Tami Olafunmiloye 2021-04-01 17:21:25 -04:00 committed by GitHub
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@ -2,7 +2,7 @@
Automated testing will be used in further tasks, and it's also widely used in real projects.
## Why we need tests?
## Why do we need tests?
When we write a function, we can usually imagine what it should do: which parameters give which results.