fix unittest warnings + remove trailing spaces

ixwebsocket/IXDNSLookup.cpp

@@ -94,7 +94,7 @@ namespace ix
         int port = _port;
         std::string hostname(_hostname);
 
-        // We make the background thread doing the work a shared pointer 
+        // We make the background thread doing the work a shared pointer
         // instead of a member variable, because it can keep running when
         // this object goes out of scope, in case of cancellation
         auto t = std::make_shared<std::thread>(&DNSLookup::run, this, self, hostname, port);

ixwebsocket/IXNetSystem.cpp

@@ -80,7 +80,7 @@ namespace ix
         int ret = select(maxfd + 1, &readfds, &writefds, &errorfds,
                          timeout != -1 ? &tv : NULL);
 
-        if (ret < 0) 
+        if (ret < 0)
         {
             return ret;
         }

ixwebsocket/IXSocket.cpp

@@ -54,7 +54,7 @@ namespace ix
         // which crash in FD_SET as they are larger than FD_SETSIZE.
         // Switching to ::poll does fix that.
         //
-        // However poll isn't as portable as select and has bugs on Windows, so we should write a 
+        // However poll isn't as portable as select and has bugs on Windows, so we should write a
         // shim to fallback to select on those platforms.
         // See https://github.com/mpv-player/mpv/pull/5203/files for such a select wrapper.
         //