Fix test error

Signed-off-by: JCW <a1q123456@users.noreply.github.com>

src/libxrpl/beast/utility/beast_Journal.cpp

@@ -296,7 +296,6 @@ Journal::formatLog(std::string const& message)
 {
     if (!jsonLogsEnabled_)
     {
-        currentJsonLogContext_.writer().buffer() += " ";
         currentJsonLogContext_.writer().buffer() += message;
         return currentJsonLogContext_.writer().buffer();
     }