compositor: fix wlr_surface_set_role() error messages

types/wlr_compositor.c

@@ -774,7 +774,7 @@ bool wlr_surface_set_role(struct wlr_surface *surface,
 	if (surface->role != NULL && surface->role != role) {
 		if (error_resource != NULL) {
 			wl_resource_post_error(error_resource, error_code,
-				"Cannot assign role %s to wl_surface@%" PRIu32 ", already has role %s\n",
+				"Cannot assign role %s to wl_surface@%" PRIu32 ", already has role %s",
 				role->name, wl_resource_get_id(surface->resource),
 				surface->role->name);
 		}
@@ -782,9 +782,8 @@ bool wlr_surface_set_role(struct wlr_surface *surface,
 	}
 	if (surface->role_data != NULL && surface->role_data != role_data) {
 		wl_resource_post_error(error_resource, error_code,
-			"Cannot reassign role %s to wl_surface@%" PRIu32 ","
-			"role object still exists", role->name,
-			wl_resource_get_id(surface->resource));
+			"Cannot reassign role %s to wl_surface@%" PRIu32 ", role object still exists",
+			role->name, wl_resource_get_id(surface->resource));
 		return false;
 	}