surah hijr- allah says that he will preserve the quran
look at the bible and torah, they are changing it up everyday- female bishops, gay priests, no interest between jews only etc. the quran was revealed more than 1400 years ago and has never changed. as for haraka and extras it is dependent on the qiraat. the meaning however, will never deviate. stop trying to defame our scholars because at the end of the day our knowledge is pathetic compared theirs. they can make mistakes but there is no fault in islam. the quran has been revealed to explain all matters- surah nahl