For testing, i modified this line: ast_cli(fd, "%30.30s %s\n", e->_full_cmd, S_OR(e->summary, "<no description available>")); in *help1 function, with this: ast_cli(fd, "%30.30s %s\n", e->_full_cmd, S_OR(e->summary, "<no description available>")); and i executed make, but the output isn't changed. What's wrong?! Regards.