patch 8.1.1510: a plugin cannot easily expand a command like done internally commit https://github.com/vim/vim/commit/80dad48c5095d30873a42ec82628bdb213125d8e Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jun 9 17:22:31 2019 +0200 patch 8.1.1510: a plugin cannot easily expand a command like done internally Problem: A plugin cannot easily expand a command like done internally. Solution: Add the expandcmd() function. (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/4514)

/* pty.c */
int setup_slavepty(int fd);
int mch_openpty(char **ttyn);
int mch_isatty(int fd);
/* vim: set ft=c : */