extern const char git_usage_string[];
extern const char git_more_info_string[];
-extern void list_common_cmds_help(void);
-extern const char *help_unknown_cmd(const char *cmd);
extern void prune_packed_objects(int);
extern int fmt_merge_msg(struct strbuf *in, struct strbuf *out,
int merge_title, int shortlog_len);