Updated documentation

README.md

@@ -4,7 +4,7 @@ cpp-httplib
 [![Build Status](https://travis-ci.org/yhirose/cpp-httplib.svg?branch=master)](https://travis-ci.org/yhirose/cpp-httplib)
 [![Bulid Status](https://ci.appveyor.com/api/projects/status/github/yhirose/cpp-httplib?branch=master&svg=true)](https://ci.appveyor.com/project/yhirose/cpp-httplib)
 
-A C++11 header-only cross platform HTTP/HTTPS library.
+A C++ header-only cross platform HTTP/HTTPS library.
 
 It's extremely easy to setup. Just include **httplib.h** file in your code!
 
@@ -121,6 +121,7 @@ int main(void)
   auto res = cli.Get("/large-data", [&](const char *data, size_t len) {
     body.append(data, len);
   });
+  assert(res->body.empty());
 ```
 
 ### POST