format_decorations_extended((strbuf), (commit), (color), " (", ", ", ")")
void show_decorations(struct rev_info *opt, struct commit *commit);
void log_write_email_headers(struct rev_info *opt, struct commit *commit,
- const char **subject_p,
const char **extra_headers_p,
int *need_8bit_cte_p);
void load_ref_decorations(int flags);