patch 8.1.0471: some tests are flaky or fail on some systems commit https://github.com/vim/vim/commit/453ce7c16b1001f23f2281b259176c6a00d82999 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Oct 12 22:15:12 2018 +0200 patch 8.1.0471: some tests are flaky or fail on some systems Problem: Some tests are flaky or fail on some systems. Solution: Increase waiting time for port number. Use "cmd /c" to execute "echo" on win32. (Ken Takata, closes #3534)