http-client-java, bug fix on enum variable name

[weidongxu-microsoft]

follow up on #7448

[github-actions]

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[Copilot]

Pull Request Overview

This PR addresses a bugfix in the enum member name generation for the HTTP client Java generator. Key changes include:

• Updating unit tests in CodeNamerTests.java to validate new naming outcomes for various inputs.
• Refactoring CodeNamer.java to remove redundant special-case handling and adding a new helper method (trimUnderscores) for cleaning leading/trailing underscores.

Reviewed Changes

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

File	Description
CodeNamerTests.java	Updated and added test cases to verify the enum member naming logic, including handling of numeric and special character inputs
CodeNamer.java	Removed outdated special-case logic and added trimming reprocessing to better handle underscore-only inputs and special character scenarios

Comments suppressed due to low confidence (1)

packages/http-client-java/generator/http-client-generator-core/src/main/java/com/microsoft/typespec/http/client/generator/core/util/CodeNamer.java:150

• While handling the case where the result is an underscore, consider adding tests for inputs that yield multiple underscores or an empty string after trimming to ensure consistent behavior.

if (result.equals("_")) {

[azure-sdk]

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