patch 9.0.1504: no error when calling remote_startserver("") Commit: https://github.com/vim/vim/commit/17b695190d63b2de745499cb40a383c2672e275e Author: h-east <h.east.727@gmail.com> Date: Mon May 1 22:36:56 2023 +0100 patch 9.0.1504: no error when calling remote_startserver("") Problem: No error when calling remote_startserver() with an empty string. Solution: Give an error for an empty string. (Hirohito Higashi, closes #12327)