Can you tell me about the devotee who gave up sugar for Sai Baba? What was his story?

The devotee who gave up sugar was named Cholkar. He had made a vow to Shirdi and, until it could be fulfilled, he completely avoided sugar, even drinking his tea without it. This was a significant sacrifice, as the text describes worldly life as a difficult "threshold-ghat" to cross. According to Chapter 15, he eventually made his way to Shirdi, where he had Sai Baba's darshan, prostrated at his feet, and joyfully fulfilled his vow by distributing sugar and offering a coconut. The story culminates in Baba demonstrating His omniscience by specifically telling another devotee to serve Cholkar tea that was "well-filled with sugar," confirming that Baba knew all about his secret vow.