redundant_allocation: change to MaybeIncorrect

Author: lengyijun

clippy_lints/src/types/redundant_allocation.rs

@@ -20,7 +20,7 @@ pub(super) fn check(cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, qpath: &QPath<'_
     };
 
     if let Some(span) = utils::match_borrows_parameter(cx, qpath) {
-        let mut applicability = Applicability::MachineApplicable;
+        let mut applicability = Applicability::MaybeIncorrect;
         span_lint_and_sugg(
             cx,
             REDUNDANT_ALLOCATION,
@@ -51,7 +51,7 @@ pub(super) fn check(cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, qpath: &QPath<'_
         Some(ty) => ty.span,
         None => return false,
     };
-    let mut applicability = Applicability::MachineApplicable;
+    let mut applicability = Applicability::MaybeIncorrect;
     span_lint_and_sugg(
         cx,
         REDUNDANT_ALLOCATION,