int use_color, const struct decoration_options *opts);
void show_decorations(struct rev_info *opt, struct commit *commit);
void log_write_email_headers(struct rev_info *opt, struct commit *commit,
int use_color, const struct decoration_options *opts);
void show_decorations(struct rev_info *opt, struct commit *commit);
void log_write_email_headers(struct rev_info *opt, struct commit *commit,