PR for Copilot review in #9

[Mila1004]

Merges changes from Copilot review in #9 (corresponding Issue: #14 ).
Mainly includes code quality improvements.

[Copilot]

Pull request overview

This PR addresses code quality improvements identified in issue #14, focusing on test naming conventions, documentation clarity, code cleanup, and minor refinements to error messages and formatting.

Key changes:

• Standardized test method naming to follow Java conventions (camelCase starting with lowercase)
• Improved documentation and error messages for better clarity
• Removed commented-out code and unnecessary blank lines
• Introduced a constant for map load capacity multiplier to reduce magic numbers

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
FragmentFingerprinterTest.java	Renamed test methods to follow naming conventions, removed large block of commented-out code, added clarifying comment
ExampleUsageTest.java	Removed excessive blank lines and commented-out code, fixed typo in comment
FragmentFingerprinter.java	Introduced constant for map capacity multiplier, improved error messages, enhanced method documentation, fixed typos, changed method visibility
CountFingerprint.java	Fixed typos in comments and error messages, simplified conditional logic, added documentation warning

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[sonarqubecloud]

Quality Gate failed

Failed conditions
70.4% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud

[JonasSchaub]

minimal comments, rest looks good!