add chapter 15.7 (#683)

eBook/examples/chapter_15/template_with_end.go

@@ -0,0 +1,21 @@
+// template_with_end.go
+package main
+
+import (
+	"os"
+	"text/template"
+)
+
+func main() {
+	t := template.New("test")
+	t, _ = t.Parse("{{with `hello`}}{{.}}{{end}}!\n")
+	t.Execute(os.Stdout, nil)
+
+	t, _ = t.Parse("{{with `hello`}}{{.}} {{with `Mary`}}{{.}}{{end}}{{end}}!\n")
+	t.Execute(os.Stdout, nil)
+}
+
+/* Output:
+hello!
+hello Mary!
+*/