printer: stop printer_test.go looking like generated code

printer/printer_test.go

@@ -6,26 +6,26 @@ import (
 	"github.com/mmcloughlin/avo/printer"
 )
 
-func ExampleConfig_GeneratedWarning() {
+func ExampleConfig_GeneratedBy() {
 	// Default configuration named "avo".
 	cfg := printer.NewDefaultConfig()
-	fmt.Println(cfg.GeneratedWarning())
+	fmt.Println(cfg.GeneratedBy())
 
 	// Name can be customized.
 	cfg = printer.Config{
 		Name: "mildred",
 	}
-	fmt.Println(cfg.GeneratedWarning())
+	fmt.Println(cfg.GeneratedBy())
 
 	// Argv takes precedence.
 	cfg = printer.Config{
 		Argv: []string{"echo", "hello", "world"},
 		Name: "mildred",
 	}
-	fmt.Println(cfg.GeneratedWarning())
+	fmt.Println(cfg.GeneratedBy())
 
 	// Output:
-	// Code generated by avo. DO NOT EDIT.
-	// Code generated by mildred. DO NOT EDIT.
-	// Code generated by command: echo hello world. DO NOT EDIT.
+	// avo
+	// mildred
+	// command: echo hello world
 }