Clarify the signals example slightly

Based on feedback in #402

examples/signals/signals.go

@@ -18,19 +18,24 @@ func main() {
 
 	// Go signal notification works by sending `os.Signal`
 	// values on a channel. We'll create a channel to
-	// receive these notifications (we'll also make one to
-	// notify us when the program can exit).
+	// receive these notifications. Note that this channel
+	// should be buffered.
 	sigs := make(chan os.Signal, 1)
-	done := make(chan bool, 1)
 
 	// `signal.Notify` registers the given channel to
 	// receive notifications of the specified signals.
 	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
 
-	// This goroutine executes a blocking receive for
-	// signals. When it gets one it'll print it out
-	// and then notify the program that it can finish.
+	// We could receive from `sigs` here in the main
+	// function, but let's see how this could also be
+	// done in a separate goroutine, to demonstrate
+	// a more realistic scenario of graceful shutdown.
+	done := make(chan bool, 1)
+
 	go func() {
+		// This goroutine executes a blocking receive for
+		// signals. When it gets one it'll print it out
+		// and then notify the program that it can finish.
 		sig := <-sigs
 		fmt.Println()
 		fmt.Println(sig)

examples/signals/signals.hash

@@ -1,2 +1,2 @@
-ccee3fe41771b7cf56d64de38b12588022458154
-YRV64KEXJW1
+cd15508731199185f3205692af0f80cbdee4fcd7
+LauPuRo3v9l

examples/testing/main_test.go

@@ -66,3 +66,9 @@ func TestIntMinTableDriven(t *testing.T) {
 		})
 	}
 }
+
+func BenchmarkIntMin(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		IntMin(1, 2)
+	}
+}

examples/testing/testing.hash

@@ -1,2 +1,2 @@
-c9ca6b71d9f762b689f1f08a490d8c7f7764fcb3
-vY8PN0c6BSx
+25e8941d63b555a590e6d44a95ae0e41ecadadca
+ALL2BVLkYEr