fix some typos

compiler/rustc_data_structures/src/sso/set.rs

@@ -27,7 +27,7 @@ pub struct SsoHashSet<T> {
     map: SsoHashMap<T, ()>,
 }
 
-/// Adapter function used ot return
+/// Adapter function used to return
 /// result if SsoHashMap functions into
 /// result SsoHashSet should return.
 #[inline(always)]

compiler/rustc_middle/src/mir/interpret/queries.rs

@@ -51,7 +51,7 @@ impl<'tcx> TyCtxt<'tcx> {
 
         match ty::Instance::resolve_opt_const_arg(
             self, param_env,
-            // FIXME: maybe have a seperate version for resolving mir::UnevaluatedConst?
+            // FIXME: maybe have a separate version for resolving mir::UnevaluatedConst?
             ct.def, ct.substs,
         ) {
             Ok(Some(instance)) => {

compiler/rustc_trait_selection/src/traits/project.rs

@@ -264,7 +264,7 @@ fn project_and_unify_type<'cx, 'tcx>(
     };
     debug!(?normalized, ?obligations, "project_and_unify_type result");
     let actual = obligation.predicate.term;
-    // For an example where this is neccessary see src/test/ui/impl-trait/nested-return-type2.rs
+    // For an example where this is necessary see src/test/ui/impl-trait/nested-return-type2.rs
     // This allows users to omit re-mentioning all bounds on an associated type and just use an
     // `impl Trait` for the assoc type to add more bounds.
     let InferOk { value: actual, obligations: new } =

src/test/ui/generic-associated-types/bugs/issue-91762.rs

@@ -1,7 +1,7 @@
 // check-fail
 // known-bug
 
-// We almost certaintly want this to pass, but
+// We almost certainly want this to pass, but
 // it's particularly difficult currently, because we need a way of specifying
 // that `<Self::Base as Functor>::With<T> = Self` without using that when we have
 // a `U`. See `https://github.com/rust-lang/rust/pull/92728` for a (hacky)

src/test/ui/let-else/let-else-non-diverging.rs

@@ -11,7 +11,7 @@ fn main() {
 
     // Ensure that uninhabited types do not "diverge".
     // This might be relaxed in the future, but when it is,
-    // it should be an explicitly wanted descision.
+    // it should be an explicitly wanted decision.
     let Some(x) = Some(1) else { foo::<Uninhabited>() }; //~ ERROR does not diverge
 }
 

src/test/ui/traits/trait-upcasting/multiple-occurrence-ambiguousity.stderr

@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/multiple-occurence-ambiguousity.rs:21:26
+  --> $DIR/multiple-occurrence-ambiguousity.rs:21:26
    |
 LL |     let t: &dyn Bar<_> = s;
    |            -----------   ^ expected trait `Bar`, found trait `Foo`