Remove parentheses for single parameter lambda

I understand this is probably against the design philosophy, but I would like to get it confirmed if that is the case.

It is generally considered to be a bette practice omitting parentheses for single parameter lambda, for example `foo -> ...` is better than `(foo) -> ...`, from readability perspective.

I tried hacking around and could get it to work, but I had to ignore a token by adding a new method to `OpsBuilder`, so either I'm doing something wrong or this is very much against the design philosophy (respecting original input as much as possible, IIUC).

Could you please help me understand whether this is a valid feature request or not? Thank you very much.

檢查 lambda-formatting 路徑以及 issue 中提到的 OpsBuilder 行為。確定是否應在不使用括號的情況下輸出單一參數的 lambda，同時保留 formatter 的設計限制。完成的標準是得出明確的決定，並且如果接受此方案，則定義預期的格式化行為及其測試。

由索引模型根據 Issue 內容生成。