ANCHOR_WORD_BEGIN 1420 regcomp.c        case ANCHOR_WORD_BEGIN:     r = add_opcode(reg, OP_WORD_BEGIN);     break;
ANCHOR_WORD_BEGIN 6228 regcomp.c          case ANCHOR_WORD_BEGIN:      fputs("word begin", f);     break;
ANCHOR_WORD_BEGIN 3262 regparse.c           tok->u.anchor = ANCHOR_WORD_BEGIN;