fix compiler errors

Author: HTGAzureX1212

compiler/rustc_hir_analysis/src/structured_errors/missing_cast_for_variadic_arg.rs

@@ -41,19 +41,19 @@ impl<'tcx> StructuredDiagnostic<'tcx> for MissingCastForVariadicArg<'tcx, '_> {
             err.downgrade_to_delayed_bug();
         }
 
-            let msg = if self.ty.is_fn() {
-                err.help("a function item is zero-sized and needs to be casted into a function pointer to be used in FFI")
+        let msg = if self.ty.is_fn() {
+            err.help("a function item is zero-sized and needs to be casted into a function pointer to be used in FFI")
                 .note("for more information on function items, visit https://doc.rust-lang.org/reference/types/function-item.html");
-                "cast the value into a function pointer".to_string()
-            } else {
-                format!("cast the value to `{}`", self.cast_ty)
-            };
-            err.span_suggestion_verbose(
-                self.span.shrink_to_hi(),
-                msg,
-                format!(" as {}", snippet, self.cast_ty),
-                Applicability::MachineApplicable,
-            );
+            "cast the value into a function pointer".to_string()
+        } else {
+            format!("cast the value to `{}`", self.cast_ty)
+        };
+        err.span_suggestion_verbose(
+            self.span.shrink_to_hi(),
+            msg,
+            format!(" as {}", self.cast_ty),
+            Applicability::MachineApplicable,
+        );
 
         err
     }