fix(server): suppression of a potential raised exception with running processes manipulation

[mdevolde]

fix(server): suppression of a potential raised exception with running processes manipulation

Why the pull request was made

To avoid a potential exception raised in the close method of the server, and having a silent close.

Summary of changes

• Supress a ValueError that can be raised in _RUNNING_SERVER_PROCESSES.remove if our server is not yet or not anymore in this list.

Screenshots (if appropriate):

Not applicable.

How has this been tested?

Applied local tests.

Resources

Not applicable.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (changes to documentation only)
• Refactor / code style update (non-breaking change that improves code structure or readability)
• Tests / CI improvement (adding or updating tests or CI configuration only)
• Chore / maintenance (non-breaking change that does not affect functionality, such as updating dependencies or fixing typos)
• Other (please describe):

Checklist

• Followed the project's contributing guidelines.
• Updated any relevant tests.
• Updated any relevant documentation.
• Added comments to your code where necessary.
• Formatted your code, run the linters, checked types and tests.
• Added your changes to the CHANGELOG file, if applicable.

[Copilot]

Pull request overview

This PR hardens local server shutdown by preventing LanguageTool._terminate_server() from raising when the server process is unexpectedly missing from the global _RUNNING_SERVER_PROCESSES tracking list, improving reliability of close()-based cleanup.

Changes:

• Suppress ValueError around _RUNNING_SERVER_PROCESSES.remove(self._server) during server termination.
• Document the fix in the changelog.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/language_tool_python/server.py	Makes _terminate_server() resilient to missing process entries in _RUNNING_SERVER_PROCESSES.
CHANGELOG.md	Adds a “Fixed” entry describing the shutdown exception prevention.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.66%. Comparing base (9cd9cc0) to head (1e4d0fb).
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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #212      +/-   ##
==========================================
+ Coverage   80.65%   80.66%   +0.01%     
==========================================
  Files          13       13              
  Lines        1768     1769       +1     
==========================================
+ Hits         1426     1427       +1     
  Misses        342      342              

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