Fix clippy::println_empty_string, clippy::while_let_on_iterator, clippy::while_let_on_iterator lint style violations (#36613)

Related: #36577

Release Notes:

- N/A

crates/git/src/repository.rs

@@ -916,7 +916,7 @@ impl GitRepository for RealGitRepository {
                     .context("no stdin for git cat-file subprocess")?;
                 let mut stdin = BufWriter::new(stdin);
                 for rev in &revs {
-                    write!(&mut stdin, "{rev}\n")?;
+                    writeln!(&mut stdin, "{rev}")?;
                 }
                 stdin.flush()?;
                 drop(stdin);