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Auto merge of #31959 - teoryn:patch-4, r=Manishearth

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bors 2016-02-29 01:50:34 +00:00
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src/doc/book/concurrency.md
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@ -259,7 +259,7 @@ thread::spawn(move || {
```
First, we call `lock()`, which acquires the mutex's lock. Because this may fail,
it returns an `Result<T, E>`, and because this is just an example, we `unwrap()`
it returns a `Result<T, E>`, and because this is just an example, we `unwrap()`
it to get a reference to the data. Real code would have more robust error handling
here. We're then free to mutate it, since we have the lock.