commit https://github.com/vim/vim/commit/d22e9465f6228207a4fe722ee84371c7817060d6 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Mar 15 17:43:55 2016 +0100 patch 7.4.1574 Problem: ":undo 0" does not work. (Florent Fayolle) Solution: Make it undo all the way. (closes https://github.com/vim/vim/issues/688)

/* if_ruby.c */
int ruby_enabled(int verbose);
void ruby_end(void);
void ex_ruby(exarg_T *eap);
void ex_rubydo(exarg_T *eap);
void ex_rubyfile(exarg_T *eap);
void ruby_buffer_free(buf_T *buf);
void ruby_window_free(win_T *win);
void vim_ruby_init(void *stack_start);
/* vim: set ft=c : */