Line with just a space in gitignore causes whole project to be ignored

Nobody has claimed this yet.

### 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?

Diagnostics/Syntax Checking

### Expected Behaviour

An empty space (literally just ` `) along with `"Lua.workspace.useGitIgnore" : true` being set seems to be causing my whole project to be ignored.

### Actual Behaviour

I'd expect it to be ignored. The `.gitignore` docs (https://git-scm.com/docs/gitignore#_pattern_format) say:

> Trailing spaces are ignored unless they are quoted with backslash ("\").

### Reproduction steps

1. Assign global in `a.lua`: `x = 100`
2. Add `.gitignore` with empty space character
3. See below:

Removing the `.gitignore` file fixes the issue.

### Additional Notes

_No response_

### Log File

_No response_

Reproduce the behavior with the `Lua.workspace.useGitIgnore` setting enabled, a `.gitignore` containing only a space, and the `a.lua` assignment described in the issue. Trace the gitignore handling used by diagnostics and verify that a whitespace-only line is ignored without causing the whole project to be ignored.

Written by the indexing model from the issue text.