SPRINTF_BUFSIZE  3441 src/editfns.c    char initial_buffer[1000 + SPRINTF_BUFSIZE];
SPRINTF_BUFSIZE  3551 src/editfns.c        enum { CONVBYTES_ROOM = SPRINTF_BUFSIZE - 1 };
SPRINTF_BUFSIZE  3552 src/editfns.c        eassert (p <= buf + bufsize - SPRINTF_BUFSIZE);