Spell check stops between `$\in[$` and `]`

[peiranxiao]

Describe the bug
Spell check stops between $\in[$ and $]$ (or simply ]). Checking is restored after adding a whitespace in `$\in [$'.

Steps to reproduce
Steps to reproduce the behavior:

1. Input This is a bugs. This are another mistake. $y \in (c,d].$ LTeX catches the mistakes.
2. Add $x \in[a,b)$. before the sentence. LTeX stops checking between \in[ and ].
3. Add a whitespace after \in: $x \in [a,b)$. LTeX starts checking again.

Expected behavior
Spell check stops between $\in[$' and ]. Checking is restored after adding a whitespace in $\in [$'.

Sample document
If the bug occurs for a specific document (e.g. LaTeX), please paste it here. If your document is very long or confidential, please create and attach a smaller example for which the bug still occurs so that we can reproduce it.

\begin{document}
$x\in[a,b)$.
This is a bugs. This are another mistake.  $(c,d]$
\end{document}

LTeX configuration
Please paste all configuration settings starting with ltex. from your settings.json. You can help us by temporarily removing some irrelevant settings from your settings.json and see if the bug still occurs.

Default

"LTeX Language Server" log file
First, reproduce the bug. Then, go to View → Output and select LTeX Language Server in the drop-down list. Paste this log here:

[Info  - 11:43:29 PM] Starting ltex-ls...
Nov 02, 2023 11:43:35 PM org.bsplines.ltexls.server.LtexLanguageServer initialize
INFO: ltex-ls 15.2.0 - initializing...
Nov 02, 2023 11:43:35 PM org.bsplines.ltexls.tools.I18n setLocale
INFO: Setting locale to 'en'
Nov 02, 2023 11:43:35 PM org.bsplines.ltexls.settings.SettingsManager$Companion logDifferentSettings
FINE: Reinitializing LanguageTool due to different settings for language 'en-US': setting 'additionalRules.motherTongue', old '', new 'zh-CN'
Nov 02, 2023 11:43:36 PM org.bsplines.ltexls.server.DocumentChecker logTextToBeChecked
FINE: Checking the following text in language 'en-US' via LanguageTool: " Ina0Dummy1\n\n"
Nov 02, 2023 11:43:37 PM org.bsplines.ltexls.server.DocumentChecker checkAnnotatedTextFragment
FINE: Obtained 0 rule matches

"LTeX Language Client" log file
First, set the ltex.trace.server setting in your settings.json to "verbose". Then, reload the VS Code window and reproduce the bug. Go to View → Output and select LTeX Language Client in the drop-down list. Paste this log here (note: it will contain your checked document):

2023-11-03T03:43:27.805Z Info: Setting LTeX UI language to 'en-us'.
2023-11-03T03:43:27.805Z Info: Loading i18n messages...
2023-11-03T03:43:27.806Z Info: Loading default i18n messages...
2023-11-03T03:43:27.808Z Info: 
2023-11-03T03:43:27.808Z Info: ltex.ltex-ls.path not set.
2023-11-03T03:43:27.808Z Info: Searching for ltex-ls in 'c:\Users\xiaop\.vscode\extensions\valentjn.vscode-ltex-13.1.0\lib'...
2023-11-03T03:43:27.809Z Info: ltex-ls found in 'c:\Users\xiaop\.vscode\extensions\valentjn.vscode-ltex-13.1.0\lib\ltex-ls-15.2.0'.
2023-11-03T03:43:27.809Z Info: 
2023-11-03T03:43:27.809Z Info: Using ltex-ls from 'c:\Users\xiaop\.vscode\extensions\valentjn.vscode-ltex-13.1.0\lib\ltex-ls-15.2.0'.
2023-11-03T03:43:27.809Z Info: Using Java bundled with ltex-ls as ltex.java.path is not set.
2023-11-03T03:43:27.810Z Info: Testing ltex-ls...
2023-11-03T03:43:27.810Z Info:   Command: "c:\\Users\\xiaop\\.vscode\\extensions\\valentjn.vscode-ltex-13.1.0\\lib\\ltex-ls-15.2.0\\bin\\ltex-ls.bat"
2023-11-03T03:43:27.810Z Info:   Arguments: ["--version"]
2023-11-03T03:43:27.810Z Info:   env['JAVA_HOME']: undefined
2023-11-03T03:43:27.810Z Info:   env['JAVA_OPTS']: "-Xms64m -Xmx512m"
2023-11-03T03:43:29.293Z Info: Test successful!
2023-11-03T03:43:29.293Z Info: 
2023-11-03T03:43:29.297Z Info: Starting ltex-ls...
2023-11-03T03:43:29.297Z Info:   Command: "c:\\Users\\xiaop\\.vscode\\extensions\\valentjn.vscode-ltex-13.1.0\\lib\\ltex-ls-15.2.0\\bin\\ltex-ls.bat"
2023-11-03T03:43:29.297Z Info:   Arguments: []
2023-11-03T03:43:29.297Z Info:   env['JAVA_HOME']: undefined
2023-11-03T03:43:29.297Z Info:   env['JAVA_OPTS']: "-Xms64m -Xmx512m"
2023-11-03T03:43:29.297Z Info: 
2023-11-03T03:43:35.841Z Info: Started watching external setting file '\.vscode\ltex.dictionary.en-US.txt'.

Version information
List here the version information of the relevant software.

• Operating system: Windows 10
• VS Code: 1.84.0
• vscode-ltex: 13.1.0

Additional context/information
You can add any other context or information about the problem here.