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Don't recommend ONCE_INIT in std::sync::Once

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ONCE_INIT is deprecated, and so suggesting it as not only being on par with, but before `Once::new` is a bad idea.
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boyned//Kampfkarren 2019-10-16 00:06:01 -07:00 committed by GitHub
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src/libstd/sync/once.rs
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@ -60,10 +60,9 @@
/// A synchronization primitive which can be used to run a one-time global
/// initialization. Useful for one-time initialization for FFI or related
/// functionality. This type can only be constructed with the [`ONCE_INIT`]
/// value or the equivalent [`Once::new`] constructor.
/// functionality. This type can only be constructed with the [`Once::new`]
/// constructor.
///
/// [`ONCE_INIT`]: constant.ONCE_INIT.html
/// [`Once::new`]: struct.Once.html#method.new
///
/// # Examples