slogr test: fix and enhance names

ExampleNewSlogLogger was wrong, the function is called NewSlogHandler.

Distinguishing what kind of logger a variable holds makes the examples a bit
easier to read. Normally one probably wouldn't do that.

slogr_test.go

@@ -49,19 +49,19 @@ var debugWithoutTime = &slog.HandlerOptions{
 }
 
 func ExampleNew() {
-	logger := logr.NewLogr(slog.NewTextHandler(os.Stdout, debugWithoutTime))
+	logrLogger := logr.NewLogr(slog.NewTextHandler(os.Stdout, debugWithoutTime))
 
-	logger.Info("hello world")
-	logger.Error(errors.New("fake error"), "ignore me")
-	logger.WithValues("x", 1, "y", 2).WithValues("str", "abc").WithName("foo").WithName("bar").V(4).Info("with values, verbosity and name")
+	logrLogger.Info("hello world")
+	logrLogger.Error(errors.New("fake error"), "ignore me")
+	logrLogger.WithValues("x", 1, "y", 2).WithValues("str", "abc").WithName("foo").WithName("bar").V(4).Info("with values, verbosity and name")
 
 	// Output:
 	// level=INFO msg="hello world"
 	// level=ERROR msg="ignore me" err="fake error"
 	// level=DEBUG msg="with values, verbosity and name" x=1 y=2 str=abc logger=foo/bar
 }
 
-func ExampleNewSlogLogger() {
+func ExampleNewSlogHandler() {
 	funcrLogger := funcr.New(func(prefix, args string) {
 		if prefix != "" {
 			fmt.Fprintln(os.Stdout, prefix, args)
@@ -72,13 +72,13 @@ func ExampleNewSlogLogger() {
 		Verbosity: 10,
 	})
 
-	logger := slog.New(logr.NewSlogHandler(funcrLogger))
-	logger.Info("hello world")
-	logger.Error("ignore me", "err", errors.New("fake error"))
-	logger.With("x", 1, "y", 2).WithGroup("group").With("str", "abc").Warn("with values and group")
+	slogLogger := slog.New(logr.NewSlogHandler(funcrLogger))
+	slogLogger.Info("hello world")
+	slogLogger.Error("ignore me", "err", errors.New("fake error"))
+	slogLogger.With("x", 1, "y", 2).WithGroup("group").With("str", "abc").Warn("with values and group")
 
-	logger = slog.New(logr.NewSlogHandler(funcrLogger.V(int(-slog.LevelDebug))))
-	logger.Info("info message reduced to debug level")
+	slogLogger = slog.New(logr.NewSlogHandler(funcrLogger.V(int(-slog.LevelDebug))))
+	slogLogger.Info("info message reduced to debug level")
 
 	// Output:
 	// "level"=0 "msg"="hello world"