It modernizes the coding style of the crate stdarch-gen-arm by fixing
Clippy warnings (except clippy::{collapsible_if,obfuscated_if_else} that
might make the program look worse as a result of "fixing" warnings).
Clippy: rust version 1.89.0-nightly (6f6971078 2025-05-28)
Number of Fixed Warnings: 84/84
Note:
Rust Analyzer double counts one of the Clippy warnings so it reduces
85 warnings (as reported by the Rust Analyzer).
This commit also applies similar technique used to resolve Clippy
warnings but also simplifies identifier name formatting and makes
reading easier.
Confirmed that the exact same code will be generated.
Restructure stdarch-gen-arm to use `Group`s with `Delimiter`s rather
than ad-hoc `Punct`s.
`Punct` should only be used to represent specific characters, and never
for bracket-like characters. Recent versions of `Punct::new` check this
with an assertion.
Note that there doesn't appear to be a way to emit a line break for
formatting reasons — `Punct::new('\n', ...)` no longer works — so this
also removes all blank lines between functions in the generated files.
