Update examples

Author: nhooyr

README.md

@@ -35,7 +35,9 @@ go get cdr.dev/slog
 Many more examples available at [godoc](https://godoc.org/cdr.dev/slog#pkg-examples).
 
 ```go
-slogtest.Info(t, "my message here",
+log := sloghuman.Make(os.Stdout)
+
+log.Info(context.Background(), "my message here",
     slog.F("field_name", "something or the other"),
     slog.F("some_map", slog.M(
         slog.F("nested_fields", "wowow"),
@@ -50,7 +52,7 @@ slogtest.Info(t, "my message here",
 )
 ```
 
-![Example output screenshot](https://i.imgur.com/o8uW4Oy.png)
+![Example output screenshot](https://i.imgur.com/IkpYq2u.png)
 
 ## Why?
 

example_test.go

@@ -16,6 +16,33 @@ import (
 )
 
 func Example() {
+	log := sloghuman.Make(os.Stdout)
+
+	log.Info(context.Background(), "my message here",
+		slog.F("field_name", "something or the other"),
+		slog.F("some_map", slog.M(
+			slog.F("nested_fields", "wowow"),
+		)),
+		slog.Error(
+			xerrors.Errorf("wrap1: %w",
+				xerrors.Errorf("wrap2: %w",
+					io.EOF,
+				),
+			),
+		),
+	)
+
+	// 2019-12-09 05:04:53.398 [INFO]	<example.go:16>	my message here	{"field_name": "something or the other", "some_map": {"nested_fields": "wowow"}} ...
+	//  "error": wrap1:
+	//      main.main
+	//          /Users/nhooyr/src/cdr/scratch/example.go:22
+	//    - wrap2:
+	//      main.main
+	//          /Users/nhooyr/src/cdr/scratch/example.go:23
+	//    - EOF
+}
+
+func Example_testing() {
 	// Provided by the testing package in tests.
 	var t testing.TB
 

internal/assert/assert.go

@@ -24,7 +24,7 @@ func NotEqual(t testing.TB, exp, act interface{}, name string) {
 	}
 }
 
-// Success asserts exp == nil.
+// Success asserts err == nil.
 func Success(t testing.TB, err error, name string) {
 	t.Helper()
 	if err != nil {

sloggers/sloghuman/sloghuman.go

@@ -21,7 +21,8 @@ import (
 // it will be called when syncing.
 func Make(w io.Writer) slog.Logger {
 	return slog.Make(&humanSink{
-		w: syncwriter.New(w),
+		w:  syncwriter.New(w),
+		w2: w,
 	})
 }