Uh, it's literally impossible for a convention with only two candidates to be contested. Is Cheatin' Bernie going senile??
Your understanding of what a contested convention is is incorrect. So you shouldn't be accusing other people of mental illness for actually knowing what it means.
A contested convention just means Sanders won't drop out. He will not release his delegates. They will vote for him on the first ballot. The first ballot will be contested. Then of course Hillary will win but that doesn't change the fact that the first ballot was contested. The Republican convention in 2012 was contested too, because Ron Paul didn't drop out.
No, a convention that ends after the first ballot is not a contested convention.