Seyyid Kasim Gubari of Diyarbakır is recorded as being responsible for much of the calligraphy of the Sultan Ahmed Mosque (the "Blue Mosque") in Istanbul, he was commissioned to write verses from the Quran throughout the mosque. He was also said to be one of the greatest calligraphers of his day.
Seyyid Gubari wrote the Quran.
The article states Gubari wrote verses from the quran in the mosque, not that he wrote the quran. I think the system has a hard time comprehending specifics regarding these works.