Fix typo in hir lowering lint diag

compiler/rustc_hir_analysis/src/hir_ty_lowering/lint.rs

@@ -411,14 +411,16 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                 Applicability::MachineApplicable,
             );
             if !is_dyn_compatible {
-                diag.note(format!("`{trait_name}` it is dyn-incompatible, so it can't be `dyn`"));
+                diag.note(format!(
+                    "`{trait_name}` is dyn-incompatible, otherwise a trait object could be used"
+                ));
             } else {
                 // No ampersand in suggestion if it's borrowed already
                 let (dyn_str, paren_dyn_str) =
                     if borrowed { ("dyn ", "(dyn ") } else { ("&dyn ", "&(dyn ") };
 
                 let sugg = if let hir::TyKind::TraitObject([_, _, ..], _) = self_ty.kind {
-                    // There are more than one trait bound, we need surrounding parentheses.
+                    // There is more than one trait bound, we need surrounding parentheses.
                     vec![
                         (self_ty.span.shrink_to_lo(), paren_dyn_str.to_string()),
                         (self_ty.span.shrink_to_hi(), ")".to_string()),

tests/ui/dyn-compatibility/avoid-ice-on-warning-2.new.stderr

@@ -4,7 +4,7 @@ error[E0782]: expected a type, found a trait
 LL | fn id<F>(f: Copy) -> usize {
    |             ^^^^
    |
-   = note: `Copy` it is dyn-incompatible, so it can't be `dyn`
+   = note: `Copy` is dyn-incompatible, otherwise a trait object could be used
 help: use a new generic type parameter, constrained by `Copy`
    |
 LL - fn id<F>(f: Copy) -> usize {

tests/ui/dyn-compatibility/avoid-ice-on-warning-3.new.stderr

@@ -4,7 +4,7 @@ error[E0782]: expected a type, found a trait
 LL | trait A { fn g(b: B) -> B; }
    |                   ^
    |
-   = note: `B` it is dyn-incompatible, so it can't be `dyn`
+   = note: `B` is dyn-incompatible, otherwise a trait object could be used
 help: use a new generic type parameter, constrained by `B`
    |
 LL - trait A { fn g(b: B) -> B; }
@@ -32,7 +32,7 @@ error[E0782]: expected a type, found a trait
 LL | trait B { fn f(a: A) -> A; }
    |                   ^
    |
-   = note: `A` it is dyn-incompatible, so it can't be `dyn`
+   = note: `A` is dyn-incompatible, otherwise a trait object could be used
 help: use a new generic type parameter, constrained by `A`
    |
 LL - trait B { fn f(a: A) -> A; }

tests/ui/rust-2021/ice-return-unsized-can-impl-2.stderr

@@ -4,7 +4,7 @@ error[E0782]: expected a type, found a trait
 LL |     fn concrete(b: B) -> B;
    |                    ^
    |
-   = note: `B` it is dyn-incompatible, so it can't be `dyn`
+   = note: `B` is dyn-incompatible, otherwise a trait object could be used
 help: use a new generic type parameter, constrained by `B`
    |
 LL -     fn concrete(b: B) -> B;
@@ -32,7 +32,7 @@ error[E0782]: expected a type, found a trait
 LL |     fn f(a: A) -> A;
    |             ^
    |
-   = note: `A` it is dyn-incompatible, so it can't be `dyn`
+   = note: `A` is dyn-incompatible, otherwise a trait object could be used
 help: use a new generic type parameter, constrained by `A`
    |
 LL -     fn f(a: A) -> A;

tests/ui/rust-2021/ice-return-unsized-can-impl.stderr

@@ -4,7 +4,7 @@ error[E0782]: expected a type, found a trait
 LL |     fn g(new: B) -> B;
    |               ^
    |
-   = note: `B` it is dyn-incompatible, so it can't be `dyn`
+   = note: `B` is dyn-incompatible, otherwise a trait object could be used
 help: use a new generic type parameter, constrained by `B`
    |
 LL -     fn g(new: B) -> B;

tests/ui/rust-2021/ice-unsized-fn-params-2.stderr

@@ -4,7 +4,7 @@ error[E0782]: expected a type, found a trait
 LL | fn guard(_s: Copy) -> bool {
    |              ^^^^
    |
-   = note: `Copy` it is dyn-incompatible, so it can't be `dyn`
+   = note: `Copy` is dyn-incompatible, otherwise a trait object could be used
 help: use a new generic type parameter, constrained by `Copy`
    |
 LL - fn guard(_s: Copy) -> bool {

tests/ui/rust-2021/ice-unsized-fn-params.stderr

@@ -4,7 +4,7 @@ error[E0782]: expected a type, found a trait
 LL |     fn g(b: B) -> B;
    |             ^
    |
-   = note: `B` it is dyn-incompatible, so it can't be `dyn`
+   = note: `B` is dyn-incompatible, otherwise a trait object could be used
 help: use a new generic type parameter, constrained by `B`
    |
 LL -     fn g(b: B) -> B;
@@ -32,7 +32,7 @@ error[E0782]: expected a type, found a trait
 LL |     fn f(a: A) -> A;
    |             ^
    |
-   = note: `A` it is dyn-incompatible, so it can't be `dyn`
+   = note: `A` is dyn-incompatible, otherwise a trait object could be used
 help: use a new generic type parameter, constrained by `A`
    |
 LL -     fn f(a: A) -> A;

tests/ui/suggestions/dyn-incompatible-trait-should-use-self-2021-without-dyn.stderr

@@ -4,7 +4,7 @@ error[E0782]: expected a type, found a trait
 LL |     fn f(a: A) -> A;
    |             ^
    |
-   = note: `A` it is dyn-incompatible, so it can't be `dyn`
+   = note: `A` is dyn-incompatible, otherwise a trait object could be used
 help: use a new generic type parameter, constrained by `A`
    |
 LL -     fn f(a: A) -> A;
@@ -32,7 +32,7 @@ error[E0782]: expected a type, found a trait
 LL |     fn f(b: B) -> B;
    |             ^
    |
-   = note: `B` it is dyn-incompatible, so it can't be `dyn`
+   = note: `B` is dyn-incompatible, otherwise a trait object could be used
 help: use a new generic type parameter, constrained by `B`
    |
 LL -     fn f(b: B) -> B;
@@ -60,7 +60,7 @@ error[E0782]: expected a type, found a trait
 LL |     fn f(&self, c: C) -> C;
    |                    ^
    |
-   = note: `C` it is dyn-incompatible, so it can't be `dyn`
+   = note: `C` is dyn-incompatible, otherwise a trait object could be used
 help: use a new generic type parameter, constrained by `C`
    |
 LL -     fn f(&self, c: C) -> C;