append_signoff    781 builtin/commit.c 		append_signoff(&sb, ignore_non_trailer(&sb), 0);
append_signoff    692 log-tree.c     		append_signoff(&msgbuf, 0, APPEND_SIGNOFF_DEDUP);
append_signoff    313 sequencer.c    		append_signoff(msgbuf, 0, 0);
append_signoff     55 sequencer.h    void append_signoff(struct strbuf *msgbuf, int ignore_footer, unsigned flag);