Update iotest_nonblock.cpp

Author: alexey-milovidov

utils/iotest/iotest_nonblock.cpp

@@ -136,15 +136,13 @@ int mainImpl(int argc, char ** argv)
 
     for (size_t i = 0; i < descriptors; ++i)
     {
-        #if defined(OS_DARWIN)
+#if defined(OS_DARWIN)
         if (fsync(fds[i]))
             throwFromErrno("Cannot fsync", ErrorCodes::CANNOT_FSYNC);
-        #else
+#else
         if (fdatasync(fds[i]))
             throwFromErrno("Cannot fdatasync", ErrorCodes::CANNOT_FSYNC);
-        #endif
-        if (fdatasync(fds[i]))
-            throwFromErrno("Cannot fsync", ErrorCodes::CANNOT_FSYNC);
+#endif
     }
 
     watch.stop();