`space_around_table_append_operator` actual effect is inverse of expected in `.editorconfig` in IntelliJ on macOS

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

Other

### Which OS are you using?

MacOS

### What is the issue affecting?

Formatting

### Expected Behaviour

`space_around_table_append_operator` setting to boolean true in `.editorconfig` expect `t[#t + 1] = 1`, instead of `t[#t+1] = 1`.

### Actual Behaviour

Inverse occurs. If boolean true, no space is added. If boolean false, space is added.

### Reproduction steps

1. In `.editorconfig`
2. Set `space_around_table_append_operator = true` under `[*.lua]`
- This follows the schema of [EmmyLuaCodeStyle](https://github.com/CppCXY/EmmyLuaCodeStyle)
3. Format a .lua file with:
```lua
t[#t+1] = 1
t[#t + 1] = 1
```
Output is inverse of what is expected:
```lua
t[#t+1] = 1
t[#t+1] = 1
```
Expected:
```lua
t[#t + 1] = 1
t[#t + 1] = 1
```

### Additional Notes

_No response_

### Log File

`SumnekoLua (3.15.0.46-IDEA243)`
I don't know where to get the Sumneko log file on IntelliJ.

Start with the [*.lua] section of the .editorconfig and reproduce formatting in IntelliJ on macOS using the reported Lua file inputs and setting. Trace how space_around_table_append_operator is interpreted, then verify that true and false produce the documented spacing behavior.

Written by the indexing model from the issue text.