Fix incorrect suggestion when clone_on_ref_ptr is triggered in macros

clippy_lints/src/methods/mod.rs

@@ -2150,18 +2150,19 @@ fn lint_clone_on_ref_ptr(cx: &LateContext<'_>, expr: &hir::Expr<'_>, arg: &hir::
             return;
         };
 
+        let snippet = if in_macro(arg.span) {
+            snippet_with_macro_callsite(cx, arg.span, "_")
+        } else {
+            snippet(cx, arg.span, "_")
+        };
+
         span_lint_and_sugg(
             cx,
             CLONE_ON_REF_PTR,
             expr.span,
             "using `.clone()` on a ref-counted pointer",
             "try this",
-            format!(
-                "{}::<{}>::clone(&{})",
-                caller_type,
-                subst.type_at(0),
-                snippet(cx, arg.span, "_")
-            ),
+            format!("{}::<{}>::clone(&{})", caller_type, subst.type_at(0), snippet),
             Applicability::Unspecified, // Sometimes unnecessary ::<_> after Rc/Arc/Weak
         );
     }