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Fix a typo in 03_ticket_v1/08_stack (#19)
The type argument of `size_of` is `<u8>` instead of `<String>`.
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@ -45,7 +45,7 @@ using the [`std::mem::size_of`](https://doc.rust-lang.org/std/mem/fn.size_of.htm
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For a `u8`, for example:
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```rust
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// We'll explain this funny-looking syntax (`::<String>`) later on.
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// We'll explain this funny-looking syntax (`::<u8>`) later on.
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// Ignore it for now.
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assert_eq!(std::mem::size_of::<u8>(), 1);
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```
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@ -59,4 +59,4 @@ assert_eq!(std::mem::size_of::<u8>(), 1);
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[^stack-overflow]: If you have nested function calls, each function pushes its data onto the stack when it's called but
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it doesn't pop it off until the innermost function returns.
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If you have too many nested function calls, you can run out of stack space—the stack is not infinite!
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That's called a [**stack overflow**](https://en.wikipedia.org/wiki/Stack_overflow).
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That's called a [**stack overflow**](https://en.wikipedia.org/wiki/Stack_overflow).
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