Escape Click’s Wrapping in bulled lists of adk web options

[ftnext]

Link to Issue or Description of Change

2. Or, if no issue exists, describe the change:

Problem:
Click collapses intended bullet lists in the service URI options.

Solution:
Add \b on a line by itself before the formatted block to preserve blank lines.

Testing Plan

This is format improvement of help message, so I think there is no need to add test case.

Unit Tests:

• I have added or updated unit tests for my change.
• All unit tests pass locally.

% pytest tests/unittests/cli  # Python 3.13.8
===================================== 260 passed, 140 warnings in 9.30s ======================================

Manual End-to-End (E2E) Tests:

adk web --help

  --session_service_uri TEXT      Optional. The URI of the session service. If set, ADK uses this service.
                                  
                                  If unset, ADK chooses a default session service (see
                                  --use_local_storage).
                                  - Use 'agentengine://<agent_engine>' to connect to Agent Engine
                                    sessions. <agent_engine> can either be the full qualified resource
                                    name 'projects/abc/locations/us-central1/reasoningEngines/123' or
                                    the resource id '123'.
                                  - Use 'memory://' to run with the in-memory session service.
                                  - Use 'sqlite://<path_to_sqlite_file>' to connect to a SQLite DB.
                                  - See https://docs.sqlalchemy.org/en/20/core/engines.html#backend-specific-urls
                                    for supported database URIs.

Checklist

• I have read the CONTRIBUTING.md document.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have manually tested my changes end-to-end.
• Any dependent changes have been merged and published in downstream modules.

[gemini-code-assist]

Summary of Changes

Hello @ftnext, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the user experience of the adk web command-line interface by improving the readability of its help messages. It resolves a specific formatting problem where bulleted lists for service URI options were not displayed correctly, making the information difficult to consume. The change ensures that these lists are now properly formatted and easy to understand.

Highlights

• Help Message Formatting Fix: Addresses an issue where bulleted lists in the adk web command's help output were collapsing due to how the Click library processes text.
• Preserving Blank Lines: The solution involves adding the \b escape sequence on a new line before formatted blocks within the help text strings. This instructs Click to preserve blank lines, ensuring proper list rendering.
• Affected Options: The fix has been applied to the help messages for --session_service_uri, --artifact_service_uri, and --memory_service_uri options.

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[gemini-code-assist]

Code Review

This pull request aims to fix formatting issues in the adk web command's help text, where click was collapsing paragraphs and bullet lists. The approach of using \b to preserve blank lines is correct for the session_service_uri and artifact_service_uri options. However, for the memory_service_uri option, the change is not quite right. I've provided a suggestion to correctly format the help text for that option to ensure the bulleted list is not merged with the introductory sentence.