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Add missing feature gate in multiple_supertrait_upcastable doc

This commit is contained in:
Gary Guo 2023-07-31 12:28:53 +01:00
parent 5082281609
commit e617faabe7

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@ -10,6 +10,7 @@ declare_lint! {
/// ### Example
///
/// ```rust
/// #![feature(multiple_supertrait_upcastable)]
/// trait A {}
/// trait B {}
///