"Prompt Repetition Improves Non-Reasoning LLMs " - https://arxiv.org/pdf/2512.14982

What instance of ChatGPT are you doing that with? (Reasoning?)

Observed from 5.2, on chatgpt.com. earlier versions did worse.. as in, they might take a few prompts to generate a parseable syntax. Newer versions just usually deliver one unparseable version then get it right second try. Likely I could prompt engineer to one shot but I think I would always need the specific warning about newlines.