}

	// Define a named template with specified contents.
	def := func(name, contents string) {
		sub := template.New(name)
		template.Must(sub.Parse(contents))
		template.Must(templates.AddParseTree(name, sub.Tree))
	}

	// Embedded files.
	def("css", loadCSS("html/common.css"))
	def("header", loadFile("html/header.html"))
	def("graph", loadFile("html/graph.html"))
	def("graph_css", loadCSS("html/graph.css"))

	}
	// 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`

		{"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},