Fixes for MSVC 2022 issues.

Closes boostorg#2653.

Author: klemens-morgenstern

test/beast/http/message_generator.cpp

@@ -102,11 +102,11 @@ class message_generator_test : public beast::unit_test::suite
 
     // only rvalue refs
     BOOST_STATIC_ASSERT(
-        not std::is_constructible<
+        ! std::is_constructible<
             message_generator,
             message<true, string_body>&>::value);
     BOOST_STATIC_ASSERT(
-        not std::is_constructible<
+        ! std::is_constructible<
             message_generator,
             message<true, string_body> const&>::value);
 

test/beast/http/read.cpp

@@ -386,6 +386,7 @@ class read_test
             net::io_context ioc;
             test::stream ts{ioc,
                 "GET / HTTP/1.1\r\n\r\n"};
+            ts.close(); // make sure the read completes
             BEAST_EXPECT(handler::count() == 0);
             multi_buffer b;
             request<dynamic_body> m;