Unconventional naming convention

[sunfishcode]

Several files in the repository use names which are unconventional in Rust:

    fn is_Unavail(&self) -> bool {

   let mut vlrEquivClassesUF =

etc.

These would ordinarily get warnings, however the warnings are disabled:

#![allow(non_camel_case_types)]
#![allow(non_snake_case)]

Naming conventions are subjective, and in isolation, the style used here is reasonable. However, this crate is meant to be used by Cranelift and by a broader ecosystem of Rust libraries, and it adds friction for people who work across repositories if multiple naming conventions are in use.