rustdoc: fixed messed-up rustdoc auto trait impls

Before:

    impl<T, U> UnwindSafe for (T, ...) where
        T: UnwindSafe,
        U: UnwindSafe,

After:

    impl<T> UnwindSafe for (T, ...) where
        T: UnwindSafe,

1 files changed, 4 insertions, 4 deletions

diff --git a/src/librustdoc/clean/types.rs b/src/librustdoc/clean/types.rs
index 95c84e68b83..f77884370f5 100644
--- a/src/librustdoc/clean/types.rs
+++ b/src/librustdoc/clean/types.rs
@@ -1750,7 +1750,7 @@ pub(crate) enum PrimitiveType {
     Never,
 }
 
-type SimplifiedTypes = FxHashMap<PrimitiveType, ArrayVec<SimplifiedType, 2>>;
+type SimplifiedTypes = FxHashMap<PrimitiveType, ArrayVec<SimplifiedType, 3>>;
 impl PrimitiveType {
     pub(crate) fn from_hir(prim: hir::PrimTy) -> PrimitiveType {
         use ast::{FloatTy, IntTy, UintTy};
@@ -1839,10 +1839,10 @@ impl PrimitiveType {
                 //
                 // Either manually update this arrayvec at this point
                 // or start with a more complex refactoring.
-                Tuple => [TupleSimplifiedType(2), TupleSimplifiedType(3)].into(),
+                Tuple => [TupleSimplifiedType(1), TupleSimplifiedType(2), TupleSimplifiedType(3)].into(),
                 Unit => single(TupleSimplifiedType(0)),
-                RawPointer => [PtrSimplifiedType(Mutability::Not), PtrSimplifiedType(Mutability::Mut)].into(),
-                Reference => [RefSimplifiedType(Mutability::Not), RefSimplifiedType(Mutability::Mut)].into(),
+                RawPointer => [PtrSimplifiedType(Mutability::Not), PtrSimplifiedType(Mutability::Mut)].into_iter().collect(),
+                Reference => [RefSimplifiedType(Mutability::Not), RefSimplifiedType(Mutability::Mut)].into_iter().collect(),
                 // FIXME: This will be wrong if we ever add inherent impls
                 // for function pointers.
                 Fn => ArrayVec::new(),