Optimize performance by using write_str instead of write! when there are no formatting arguments

[nyurik]

Apparently when using write!("anything without arguments"), the compiler generates considerable additional code, resulting in bigger binaries and likely slower performance. I tried it with https://rust.godbolt.org/z/Y8djWsq1P

I would like to replace write!(f, ...) with f.write_str(...) in the generated code.

P.S. This issue is also tracked in rust-lang/rust#99012 - but it appears to be highly complex and nowhere near being solved in a near future, thus warranting a workaround at least in the popular crates.