}
	// Add a non-empty template to check that the error is helpful.
	tests, err := New("").Parse(testTemplates)
	if err != nil {
		t.Fatal(err)
	}
	tmpl.AddParseTree("secondary", tests.Tree)
	err = tmpl.Execute(&b, 0)
	if err == nil {
		t.Fatal("expected second error")
	}
	got = err.Error()
	want = `template: empty: "empty" is an incomplete or empty template`

	}

	// Add a non-empty template to check that the error is helpful.
	tmpl = New("empty")
	tests, err := New("").Parse(testTemplates)
	if err != nil {
		t.Fatal(err)
	}
	tmpl.AddParseTree("secondary", tests.Tree)
	err = tmpl.Execute(&b, 0)
	if err == nil {
		t.Fatal("expected second error")
	}
	got = err.Error()
	if got != want {
		t.Errorf("expected error %s got %s", want, got)

		{"String", Func, 19},
	},
	"html": {
		{"EscapeString", Func, 0},
		{"UnescapeString", Func, 0},
	},
	"html/template": {
		{"(*Error).Error", Method, 0},
		{"(*Template).AddParseTree", Method, 0},
		{"(*Template).Clone", Method, 0},
		{"(*Template).DefinedTemplates", Method, 6},
		{"(*Template).Delims", Method, 0},
		{"(*Template).Execute", Method, 0},

pkg html/template, func ParseGlob(string) (*Template, error)
pkg html/template, func URLQueryEscaper(...interface{}) string
pkg html/template, method (*Error) Error() string
pkg html/template, method (*Template) AddParseTree(string, *parse.Tree) (*Template, error)
pkg html/template, method (*Template) Clone() (*Template, error)
pkg html/template, method (*Template) Delims(string, string) *Template