Update README.md

README.md

@@ -137,15 +137,17 @@ void daily_example()
 ```
 
 ---
-#### Cloning loggers 
+#### Backtrace support
 ```c++
-// clone a logger and give it new name.
+// Loggers can store in a ring buffer all messages (including debug/trace) for later inspection.
-// Useful for creating subsystem loggers from some "root" logger
+// When needed, call dump_backtrace() to see what happened:
-void clone_example()
+spdlog::enable_backtrace(32); // create ring buffer with capacity of 32  messages
+for(int i = 0; i < 100; i++)
 {
-    auto network_logger = spdlog::get("root")->clone("network");
+  spdlog::debug("Backtrace message {}", i); // not logged yet..
-    network_logger->info("Logging network stuff..");
 }
+// e.g. if some error happened:
+spdlog::dump_backtrace(); // log them now!
 ```
 
 ---