Code formatting doesn't work when plugin is used.

還沒有人認領這個 Issue。

### How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

### Which OS are you using?

Windows

### What is the issue affecting?

Formatting, Plugins

### Expected Behaviour

Code formatting should work when plugin is used.

### Actual Behaviour

Code formatting doesn't work when plugin is used.

### Reproduction steps

1. Create plugin and set the appropriate settings as described here https://github.com/LuaLS/lua-language-server/wiki/Plugins
2. Use it (create some file and use custom syntax)
3. Make some ugly indentation.
4. Alt+shift+f (Format document)
5. The code has not been formatted.

### Additional Notes

As you can see the error occurs in VSC but I use LSP mainly as a server for my own client in React and the error also occurs there.

### Log File

[myLog.txt](https://github.com/LuaLS/lua-language-server/files/11756298/myLog.txt)

首先，按照列出的 Visual Studio Code 步驟並使用具有自訂語法的外掛程式來重現故障。將行為與提供的 myLog.txt 進行比較，包括 React LSP client 報告。對於使用外掛程式定義語法的檔案，格式化能夠套用預期的縮排，即表示完成。

由索引模型根據 Issue 內容生成。