ANCHOR_WORD_END  1403 ext/mbstring/oniguruma/regcomp.c   case ANCHOR_WORD_END:       r = add_opcode(reg, OP_WORD_END);       break;
ANCHOR_WORD_END  5936 ext/mbstring/oniguruma/regcomp.c     case ANCHOR_WORD_END:        fputs("word end", f);       break;
ANCHOR_WORD_END  3099 ext/mbstring/oniguruma/regparse.c       tok->u.anchor = ANCHOR_WORD_END;