Tiny tweaks

src/Microsoft.AspNetCore.Sockets/LongPolling.cs

@@ -64,7 +64,7 @@ namespace Microsoft.AspNetCore.Sockets
             _lifetime.TrySetResult(null);
         }
 
-        public Task Send(ReadableBuffer value)
+        private Task Send(ReadableBuffer value)
         {
             return _queue.Enqueue(state =>
             {

src/Microsoft.AspNetCore.Sockets/ServerSentEvents.cs

@@ -79,7 +79,7 @@ namespace Microsoft.AspNetCore.Sockets
                 buffer[at++] = (byte)'a';
                 buffer[at++] = (byte)':';
                 buffer[at++] = (byte)' ';
-                data.CopyTo(new Span<byte>(buffer, at, buffer.Length - at));
+                data.CopyTo(new Span<byte>(buffer, at, data.Length));
                 at += data.Length;
                 buffer[at++] = (byte)'\n';
                 buffer[at++] = (byte)'\n';