compositor: Improve xwayland warning message

And fix formatting.

Signed-off-by: Armin Krezović <krezovic.armin@gmail.com>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>

compositor/main.c

@@ -862,7 +862,8 @@ load_modules(struct weston_compositor *ec, const char *modules,
 		if (strstr(buffer, "xwayland.so")) {
 			weston_log("Old Xwayland module loading detected: "
 				   "Please use --xwayland command line option "
-				   "or weston.ini xwayland=true\n");
+				   "or set xwayland=true in the [core] section "
+				   "in weston.ini\n");
 			*xwayland = 1;
 		} else {
 			if (wet_load_module(ec, buffer, argc, argv) < 0)