Address PR's comments

Author: mcarton

clippy_lints/src/transmute.rs

@@ -97,7 +97,7 @@ impl LateLintPass for Transmute {
                                     let sugg = if ptr_ty == rty {
                                         arg.as_ty(&to_ty.to_string())
                                     } else {
-                                        arg.as_ty(&format!("{} as {}", cx.tcx.mk_ptr(rty), to_ty))
+                                        arg.as_ty(&cx.tcx.mk_ptr(rty).to_string()).as_ty(&to_ty.to_string())
                                     };
 
                                     db.span_suggestion(e.span, "try", sugg.to_string());