* fix(autofmt): remove extra whitespace before commas in for-loop tuple patterns `dx fmt` was adding spaces before commas in for-loop destructuring patterns (e.g. `for (index , name , value)`) because `TokenStream::Display` inserts spaces between every token. Route the pattern through prettyplease via a new `unparse_pat` helper, following the existing `unparse_expr` pattern. Fixes #5348 * style: apply rustfmt to writer.rs --------- Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>