RECC_BLANK       1564 src/regex-emacs.c     if (!memcmp (beg, "blank", 5))     return RECC_BLANK;
RECC_BLANK       1598 src/regex-emacs.c     case RECC_BLANK: return ISBLANK (ch) != 0;
RECC_BLANK       1637 src/regex-emacs.c     case RECC_BLANK: return BIT_BLANK;