I noticed that variables are highlighted only in double quotes.
What about non-quoted ones?
貢獻者指南
技術棧
shell
領域
clideveloper experience
議題類型
feature
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
2
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-3 hours
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
basic shell scriptingfamiliarity with zsh syntax highlighting
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
70
研究方向
Investigate the highlighting logic in the zsh syntax highlighting plugin. Look for the pattern that currently only highlights variables in double quotes. The relevant file is likely `zsh syntax highlighting.zsh` or similar. Search for regex patterns that match `${...}` and extend to also match unquoted `$...` without quotes. Consider the parsing context to avoid conflicts with other expansions.
