Bless From<Cow> UI changes

Author: cuviper

src/test/ui/const-generics/array-impls/alloc-types-no-impls-length-33.stderr

@@ -18,7 +18,7 @@ LL |     let boxed_array = <Box<[i32; 33]>>::try_from(boxed_slice);
              <std::boxed::Box<(dyn std::error::Error + 'static)> as std::convert::From<&str>>
              <std::boxed::Box<(dyn std::error::Error + 'static)> as std::convert::From<std::borrow::Cow<'a, str>>>
              <std::boxed::Box<(dyn std::error::Error + 'static)> as std::convert::From<std::string::String>>
-           and 16 others
+           and 21 others
    = note: required because of the requirements on the impl of `std::convert::Into<std::boxed::Box<[i32; 33]>>` for `std::boxed::Box<[i32]>`
    = note: required because of the requirements on the impl of `std::convert::TryFrom<std::boxed::Box<[i32]>>` for `std::boxed::Box<[i32; 33]>`
 
@@ -38,11 +38,11 @@ LL |     let boxed_array = <Rc<[i32; 33]>>::try_from(boxed_slice);
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::convert::From<std::rc::Rc<[i32]>>` is not implemented for `std::rc::Rc<[i32; 33]>`
    |
    = help: the following implementations were found:
+             <std::rc::Rc<B> as std::convert::From<std::borrow::Cow<'a, B>>>
              <std::rc::Rc<T> as std::convert::From<T>>
              <std::rc::Rc<T> as std::convert::From<std::boxed::Box<T>>>
              <std::rc::Rc<[T]> as std::convert::From<&[T]>>
-             <std::rc::Rc<[T]> as std::convert::From<std::vec::Vec<T>>>
-           and 8 others
+           and 9 others
    = note: required because of the requirements on the impl of `std::convert::Into<std::rc::Rc<[i32; 33]>>` for `std::rc::Rc<[i32]>`
    = note: required because of the requirements on the impl of `std::convert::TryFrom<std::rc::Rc<[i32]>>` for `std::rc::Rc<[i32; 33]>`
 
@@ -62,11 +62,11 @@ LL |     let boxed_array = <Arc<[i32; 33]>>::try_from(boxed_slice);
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::convert::From<std::sync::Arc<[i32]>>` is not implemented for `std::sync::Arc<[i32; 33]>`
    |
    = help: the following implementations were found:
+             <std::sync::Arc<B> as std::convert::From<std::borrow::Cow<'a, B>>>
              <std::sync::Arc<T> as std::convert::From<T>>
              <std::sync::Arc<T> as std::convert::From<std::boxed::Box<T>>>
              <std::sync::Arc<[T]> as std::convert::From<&[T]>>
-             <std::sync::Arc<[T]> as std::convert::From<std::vec::Vec<T>>>
-           and 8 others
+           and 9 others
    = note: required because of the requirements on the impl of `std::convert::Into<std::sync::Arc<[i32; 33]>>` for `std::sync::Arc<[i32]>`
    = note: required because of the requirements on the impl of `std::convert::TryFrom<std::sync::Arc<[i32]>>` for `std::sync::Arc<[i32; 33]>`