feat (server): new method to check regex regions of a text

[mdevolde]

feat (server): new method to check regex regions of a text

Why the pull request was made

Added a feature that allows verification to be applied only to areas defined by a regex in a text.
Linked issue: #69

Summary of changes

• Added a check_matching_regions method in language_tool_python.server.LanguageTool
• Added linked test

Screenshots (if appropriate):

Not applicable.

How has this been tested?

Creation of a new test, and applied old 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)
• 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.

[Copilot]

Pull request overview

This PR adds a new feature to allow selective grammar checking of text regions defined by regular expressions. The implementation adds a check_matching_regions method to the LanguageTool class that enables verification to be applied only to specific portions of text matching a given regex pattern.

Key changes:

• New check_matching_regions method that accepts text, a regex pattern, and optional regex flags
• Proper offset adjustment to ensure Match objects can be applied to the original text
• Test coverage with special characters (emojis) to verify correct offset handling

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

File	Description
language_tool_python/server.py	Adds the check_matching_regions method with regex-based region matching and offset adjustment logic
tests/test_match.py	Adds comprehensive test case for the new method, including handling of 4-byte UTF-8 characters
coverage-badge.svg	Updates coverage percentage from 77.48% to 77.67% reflecting new code additions

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