Could you tell me the story of the devotee named Cholkar and his vow involving sugar?

The story of Cholkar illustrates Sai Baba's omniscience and compassion. As described in Chapter 15, Cholkar was a worldly man who made a vow to visit Shirdi but was delayed by his financial circumstances. Until he could fulfill his vow, he gave up sugar, even drinking his tea without it. When he finally reached Shirdi, he had Baba's darshan, offered a coconut, and distributed sugar. Later, while he was a guest of Jog, Baba specifically told Jog to give Cholkar cups of tea that were "well-filled with sugar." This revealed to Cholkar that Baba knew all about his secret, personal vow, which filled him with joy and confirmed his faith.