add source with func name

global_example_test.go

@@ -0,0 +1,24 @@
+package log_test
+
+import (
+	"context"
+
+	"gitoa.ru/go-4devs/log"
+	"gitoa.ru/go-4devs/log/level"
+)
+
+func ExampleDebug() {
+	logger := log.With(log.New(log.WithStdout()),
+		log.WithSource(2),
+		log.WithLevel(log.KeyLevel, level.Debug),
+		log.WithExit(level.Alert),
+		log.WithPanic(level.Emergency),
+	)
+
+	log.SetLogger(logger)
+
+	ctx := context.Background()
+	log.Debug(ctx, "debug message")
+	// Output:
+	// msg="debug message" source=global_example_test.go:21 level=debug
+}