Update 50-sets.md

website/content/02-introduction-to-python/060-functions/30-function-arguments.md

@@ -164,7 +164,7 @@ Why? Because it won't work like you'd expect it to.
 
 If you need to use a mutable type, like a `list` as a default, use a *marker* instead. We'll cover this technique when we talk about `list`s in the next chapter.
 
-In Python, default arguments are evaluated only once -- when the unction is defined. Not each time the function is called. That means if you use a value that can be changed, it won't behave like you'd expect it to.
+In Python, default arguments are evaluated only once -- when the function is defined. Not each time the function is called. That means if you use a value that can be changed, it won't behave like you'd expect it to.
 
 ### Naming Functions and Arguments
 
@@ -189,4 +189,4 @@ For example, I'd expect a variable called `name` to be a single string, and a va
 
 {{% notice tip %}}
 A great resource to help you figure out the best naming conventions to use in your production Python code is a talk by Brandon Rhodes, called ["The Naming of Ducks: Where Dynamic Types Meet Smart Conventions"](https://www.youtube.com/watch?v=YklKUuDpX5c).
-{{% /notice %}}
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