Fix Arc::decr_strong_count doc test
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@ -835,12 +835,14 @@ impl<T: ?Sized> Arc<T> {
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///
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/// unsafe {
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/// let ptr = Arc::into_raw(five);
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/// Arc::decr_strong_count(ptr);
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/// Arc::incr_strong_count(ptr);
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///
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/// // This assertion is deterministic because we haven't shared
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/// // Those assertions are deterministic because we haven't shared
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/// // the `Arc` between threads.
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/// let five = Arc::from_raw(ptr);
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/// assert_eq!(0, Arc::strong_count(&five));
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/// assert_eq!(2, Arc::strong_count(&five));
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/// Arc::decr_strong_count(ptr);
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/// assert_eq!(1, Arc::strong_count(&five));
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/// }
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/// ```
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#[inline]
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