Spellchecking some comments

This PR attempts to clean up some minor spelling mistakes in comments

compiler/rustc_const_eval/src/util/call_kind.rs

@@ -45,7 +45,7 @@ pub enum CallKind<'tcx> {
     },
     /// A call to `Fn(..)::call(..)`, desugared from `my_closure(a, b, c)`
     FnCall { fn_trait_id: DefId, self_ty: Ty<'tcx> },
-    /// A call to an operator trait, desuraged from operator syntax (e.g. `a << b`)
+    /// A call to an operator trait, desugared from operator syntax (e.g. `a << b`)
     Operator { self_arg: Option<Ident>, trait_id: DefId, self_ty: Ty<'tcx> },
     DerefCoercion {
         /// The `Span` of the `Target` associated type