fix typo in the summary section

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Blaise Tayou 2022-03-29 06:53:02 +01:00 committed by GitHub
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@ -535,7 +535,7 @@ Terms:
list = { value, next -> list }
```
Trees like HTML elements tree or the department tree from this chapter are also naturally recursive: they branch and every branch can have other branches.
Trees like HTML elements tree or the department tree from this chapter are also naturally recursive: they have branches and every branch can have other branches.
Recursive functions can be used to walk them as we've seen in the `sumSalary` example.