patch 9.0.1656: syntax test fails when detected shell type differs Commit: https://github.com/vim/vim/commit/7d0dbd0070fd8ed86b08f81f6acfad9a5fe55672 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jun 24 00:56:50 2023 +0100 patch 9.0.1656: syntax test fails when detected shell type differs Problem: Syntax test fails when detected shell type differs. Solution: Avoid using "/bin/sh", it depends on the system. Add a check that the shell type detection is correct.