Function claim_name 

pub fn claim_name(base: &str, taken: &mut HashSet<String>) -> String

Take base if free, else the first base N that is, recording the claim.

Every name in the bank goes through here — including user-given and preset ones. Letting those bypass collision detection while still occupying the name is what allowed two bank rows to both read exactly Glass Pad: Glass Pad is a preset name, and the generator is entitled to produce it too.